3. Fruit fly sperm is 20 times longer than their bodies
Fruit flies are some of the smallest, simplest and most annoying creatures on Earth, often seen as household pests or a subject for study in biology class. However, these invertebrate animals hide a big secret-"20 times the body" secret.
- A cat's penis
- Looking for genitals
- Cats are not smarter than dogs…
- A cat's genitals
- Cat genital organs
- Nephedchekov_Splankhnology of domestic animals
- –>OUR YORKIES AND THEIR FRIENDS –>
- Why does my cat pull his penis out?
- Cat Sexual Organs.
- Sexual organs of a cat
- Why people are interested in the size of animal genitals
- Elephant
- Horse
- Lion
- Bear
- Interesting facts
A cat's penis
Most pet owners don't understand how to tell the difference between a cat and a cat. Few experienced owners are able to do it without mistakes the first time. This is due to the underdevelopment of genital organs in small pets. However, when buying a kitten, determine the sex at once, so that in the future you know whether to neuter the cat, whether he will mark the territory.
If you are too unsure about the question, it is better to take the animal from a cattery with veterinarians who have the necessary skills in determining the sex of kittens. However, some owners receive the "gift of fate" in the stairwell, in the garden, at a bus stop, or buy a pet from acquaintances who are not versed in this matter.
Looking for genitals
It is easier to look under the baby's tail and check what he has hanging there. You can't find any other gender signs in babies under six months of age. The problem is that the genitals of 3-4 month old kittens are not distinguishable.
Before picking up your pet, follow these recommendations:
- Wash your hands with an odorless soap;
- Pet the kitten first, scratching behind the ear. If the cat is sick, unwell or has diarrhea, you should not examine it;
- take the kitten in your left hand. If palms are cold, it is advisable to put a warm towel and clean gloves.
- Holding the kitten with your left hand, feel the crotch with your right hand. In the future cat's testicles are found. But they are small – 5 mm in diameter, so that the volume resembles peas;
- try to estimate the distance between the cat's genitals, anal opening. If the space between them is small (0,5-1 cm), and there is no hair, then you have a cat in front of you. If the distance is more than a centimeter, and on the specified gap abundantly grows hair, then you are holding a cat.
Experienced veterinarians associate genitals with punctuation marks in the Russian language, this helps in establishing sex:
- in cats, the vaginal opening resembles a slit that is close to the anal opening, causing the genitals to resemble an inverted exclamation point;
- In cats, the underdeveloped genital organ looks like a dot. At the same time it is located far from the anus, which makes the genitourinary system resemble a colon.
Cats are not smarter than dogs…
Cats' intelligence is generally not higher than that of dogs. According to data published in 2010 in the journal "Proceedings of the National Academy of Sciences", over the past 60 million years, the brain of dogs has increased markedly in size, while cats have not observed anything similar.
In 2009, the year was an experiment aimed at putting an end to the dispute between "cat people" and "dog people", who after all is smarter – dogs or cats? Of course, the comparison of mental abilities is not absolutely correct – they are two different species and each is good at something different, with one of the most important arguments in the dispute, scientists considered the benefits that cats and dogs can bring a man.
Read also: "Cats refuse to cooperate with scientists".
Considering that dogs take part in operations, for example, to rescue people from under rubble, or, say, by smell can find explosives or drugs in the luggage of an intruder, while representatives of the feline family cannot do all this (or more likely – simply do not want to), it should not be surprising that the intelligence of dogs has been recognized as more outstanding than that of cats. But when you think about it, are dogs too clever to let themselves be pushed around? After all, cats are sleeping peacefully at this time, and the most serious problem for them may not be to find a tourist caught in an avalanche, and the owner, forbidding the pet to sharpen its claws on the furniture.
A cat's genitals
• Scrotum – The cavity of the sac-like protrusion of the abdominal wall, which maintains the temperature necessary for sperm maturation (a few tenths of a degree lower than in the abdominal cavity). In cats, the muscles of the scrotum can pull it up to the groin if it is too cold outside. The scrotum is located between the penis and the anus.
• The spermatic cord – A fold in the peritoneum in which blood vessels, nerves going to the testicle, and lymphatic vessels and the seminal duct exiting the testicle are located.
• Testes – A pair of egg-shaped organs located in the scrotum. The diameter of each testis in cats is 1-1.5 cm. The tubules of the testes, a special epithelium produces sperm.
• The appendage of the testis – is a narrow duct which is coiled many times and is adjacent to the testis. Spermatozoa from the canals of the testis enter the appendage, where they acquire the ability to "swim" and fertilize.
• Seminal duct (seminal duct) – The duct that connects the duct of the testicular appendage to the urethra.
• Urethra – A tube of mucous and muscular membrane ending in an opening on the glans of the penis through which semen is discharged to the outside.
• Prostate gland – The exocrine gland located at the junction of the urethra and the spermatic cord. The ducts of the prostate gland carry its secretion into the urethra, which activates the activity of spermatozoa.
• Bulbourethral glands – Paired glands of external secretion that secrete a secret, the pre-ejaculate, which lubricates and cleans the urethra for better sperm passage. Located at the base of the penis and open by ducts into the urethra.
• Penis – An external genital organ designed to introduce sperm into the cat's genitals. The penis of an uncastrated cat is covered with skin and short hair, as well as short keratinized spines (there are 100 to 200 of them). Length of cat penis is 1 cm, width 0.5 cm at the base.
Cat genital organs
• Ovaries – The ovaries are a pair of bean-shaped organs in the cat's lumbar region. The ovaries are connected by fallopian tubes to the uterus, where oocytes mature. The ovaries consist of follicles – sacs with oocytes and fluid. As the follicle matures, the follicle bursts and the egg and the follicular fluid enter the fallopian tube (ovulation occurs). And in place of the follicle a yellow body is formed, suppressing the development of other follicles. In cats, several follicles burst at the same time, which ensures a multiple pregnancy.
• Fallopian tube (oviduct) – A narrow, winding tube that connects the ovary to the uterus. Fertilization occurs in the fallopian tube, after which the egg travels to the uterus.
• Uterus – A hollow, membranous organ in which the fetus develops. In cats, the uterus is bicornal, which means it is shaped like the Latin letter Y. Each horn (3 mm in diameter and 10 mm long) is connected to its fallopian tube, and closer to the vagina the horns merge to form the uterine body (2 cm long). The uterine body gradually narrows to form, in turn, a cervix open to the vagina. Fetal maturation occurs in the horns of the uterus. The uterus is located in the pelvic and abdominal cavity.
• The vagina – a tubular organ designed for copulation and located between the cervix and the urethra.
• Vulva – A set of external genitourinary organs (vaginal vestibule + external opening of the urethra). Located below the anus and separated from it by a small perineum).
• Prenovaginal vestibule. – The general part of the genitourinary tract located behind the opening of the urethra.
• Clitoris – The genital organ, a rudiment of the penis in females, which is an erogenous zone. In cats, it is located in the genital slit, and its stimulation enables ovulation.
The genital organs of cats are similar to those of other mammals, but have a number of features unique to felines.
Nephedchekov_Splankhnology of domestic animals
begins on the inner surface of the tubercle of the sciatic bone, follows downward, enveloping the peduncle of the penis and ending on the lateral side of its root. The right and left legs join to form at the back of the penis the penile root ( radix penis ), which is fixed to the pelvic suture by a suspensory ligament ( ligus suspensorium penis ). The non-parietal spongy body of the penis lies ventral to the corpora cavernosa. It surrounds the urethra on all sides and continues to the glans to form its base (corpus spongiosumglandis). The corpus spongiosum is somewhat thickened and forms the bulb of the penis (bulbus penis). There are two parts of the penis: a fixed part enclosed in the fascial sheath, and a free part located in the pudendal region. The penis is covered from the outside by two fasciae: superficial and deep. The superficial fascia is located directly under the skin. The deep fascia, passing from the body of the penis, is fixed along the white line of the penis, forming the suspensory (ligamentumsuspensorium penis) and pectoral ligament (ligamentum fundiforme penis). The head of the penis (qlans penis) is the expanded end of the spongy body of the penis and is characterized by different structures and shapes depending on the animal species. It has a corona glandis, which is a prominent, protruding ridge, or posterior edge of the glans. The crown of the head is the narrowed part, the neck of the head (collum glandis). Sagittally (along the median line) the glans is divided into two symmetrical halves by the septum glandis. The blood supply to the penis is provided by the penile artery (a. penis), which branches from the internal pudendal artery (a. pudenda interna).
Figure 22: Incision of the male penis head The outflow of blood from the penis occurs in the dorsal vein of the penis ( v.dorsalispenis , v.profunda penis ) and in the internal iliac vein ( v. iliaca interna ). The outflow of lymph from the penis is to the superficial inguinal lymph nodes (nodi lymphatici inguinales superficiales) and deep inguinal lymph nodes (nodi lymphatici inguinales profundus). The innervation of the penis is provided by branches of the dorsal pudendal nerve ( n. dorsalis penis), which is derived from the pudendal nerve ( n. pudendus) formed by the ventral branches of 2-4 pairs of sacral nerves. Branches of the pudendal, external seminal, iliac-subiliac, and subiliac-pelvic nerves also participate in the innervation of the prepuce. Species of the penis. In bulls, the penis is cylindrical, long and thin. The cavernous body is poorly developed. Therefore, the penis of bulls increases little in volume during erection. The S-shaped or sigmoid bend (flexura sigmoidea penis) is behind the scrotum. 42
–>OUR YORKIES AND THEIR FRIENDS –>
Puberty in a domestic cat is the period when your pet has the opportunity to fully reproduce.
This period occurs at the age of eight months for both cats and cats.
In cats, eggs are formed as a result of puberty. During this period, the cat's body is fully prepared for mating.
However, with the onset of puberty, the growth of the animal's body does not stop. The first heat of a cat does not indicate its readiness for labor – early delivery undermines the health of the animal: the spine deforms, and the general development of the cat's organism is delayed. In cats, if they mate early, their reproductive rate decreases.
Sexual maturity of domestic cats depends on many factors: the sex of the animal, the breed, rational diet, the climatic conditions of the cat, as well as the nature and conditions of its care. In cats, eggs are formed earlier than sex hormones in cats begin to be secreted. The best age for mating is one year.
A cat's heat is not accompanied by bloody discharge, as, for example, in dogs, but is determined by an increase in the genitals and by the animal's changed behavior. The period of a cat's heat, which is repeated at three-week intervals, lasts five days, Cat-and-cat.com notes. Cats, unlike cats, are always ready to mate.
During the heat period, the domestic cat If you stroke a cat on its back at the rump, it will begin to buck on its front paws, move its tail to the side, purr and roll on the floor. The appetite of a cat ready to mate is very poor, and sometimes it is completely absent.
This period is characterized by frequent urge to urinate, the desire to constantly rub its owner's feet or any objects that are near. Cats, when they are in heat, attract cats not only by their inviting smell, but also by their heartbreaking screams.
Why does my cat pull his penis out?
If you've noticed that your cat's penis is protruding outward from the foreskin, it could be a sign of a urinary disorder… Urinary infections. These are common in male cats. In general, you may also notice that your cat is licking the area, showing signs of discomfort when urinating, and the penis may become purple…
If you notice these symptoms of a cat penis infection, we recommend seeing a veterinarian immediately, especially if your cat is not urinating at all. A cat urinary infection can affect the kidneys and lead to kidney failure if not treated early, which can be fatal…
Feline urinary tract infections (UTI) may require prescription medications. This infection can also be caused by stress, in which case it promotes further enrichment of the environment…
For more information, read Why does my cat push his penis and lick?
Cat Sexual Organs.
Female reproductive organs are commonly divided into internal and external organs (Figure 1).
Figure 1. Female reproductive organs, top view:
1 – accessory ligaments of ovaries; 2 – ovaries; 3 – intrinsic ligaments of ovaries; 4 – fallopian tubes; 5 – uterine horns; 6 – uterine body; 7 – cervix; 8 – bladder; 9 – vagina; 10 – urethral opening; 11 – vaginal fornix; 12 – clitoris; 13 – labia
Internal genital organs. They include the ovaries, fallopian tubes, uterus and vagina.
Ovaries (Ovaria, Oophoron). – The primary paired sex gland that performs reproductive and hormonal functions. The ovaries are ovoid in shape, somewhat flattened on the sides, and reach a diameter of about 1 cm. During the sexual hunt, the luteal phase of the sexual cycle and during pregnancy, their shape may be bulbous.
The ovaries are located in the abdominal cavity behind and below the kidneys in the open ovarian bursa. The wall of the latter is formed by the mesentery of the fallopian tubes and is translucent (free of fatty deposits). Its lower edge does not form adhesions with the surrounding tissues and is therefore easily removed from the surface of the ovary. By means of its own ligament, the ovary is connected to the apex of the corresponding horn of the uterus, and by means of the accessory (suspension) ligament is attached to the lumbar vertebrae. Additive ovarian ligaments in cats are quite long and elastic, contain blood vessels, are almost devoid of fat, and generally provide good surgical access to the ovaries.
On the outside, the ovary is covered by a single-layer cubic epithelium, under which there is a well-developed fibrous (white) sheath. The ovarian parenchyma is represented by the medullary and cortical substance. Cerebral substance consists of connective tissue, vessels and nerves and is localized inside the cortical layer. The connective-tissue base of the cortical substance contains the follicular apparatus of the ovary (primary, secondary and tertiary follicles) and the corpus luteum (Figure 2).
Sexual organs of a cat
Structure of the male reproductive organs. The male reproductive organs consist of the testes, their discharge ducts (testicular appendages, sperm ducts and urogenital duct), accessory sex glands, penis, prepuce and scrotum (Figure 1).
Testes (Testis, Orchis, Didymis), or testicles, are the primary paired sex glands that perform reproductive and hormonal functions. The testes are oval in shape, of dense elastic consistency, and reach a length of 1 … 2 cm. They produce male sex cells – sperm cells and the male sex hormone – testosterone. The testis has cephalic and caudal ends, free and appendicular margins, lateral and medial surfaces.
1 – testis; 2 – testis appendage; 3 – horny teeth of penis; 4 – penis bone; 5 – penis; 6 – sperm duct; 7 – bladder; 8 – prostate; 9 – genitourinary tract; 10 – bulbous gland
From outside the testis is covered by its own vaginal (serous) membrane, under which is the albumen membrane. Radial bands of the latter divide the testis parenchyma into numerous pyramidal lobules and form the connective tissue mediastinum of the organ. The apex of the pyramidal lobes faces the mediastinum of the testis, and their base faces the protein sheath.
Each lobule contains several convoluted tubules surrounded by loose connective tissue with a large number of blood vessels. The connective-tissue base of the pyramidal lobules contains Leydig cells producing the androgenic hormone testosterone. The tortuous tubules begin with the blind sac and, merging at the apex of the pyramidal lobule, flow into the straight tubules of the testes, whose ducts, in turn, open into the testis network (Fig. 2). Sperm are formed in the tortuous tubules of the testes; the function of the straight tubules and of the testis network is sperm transport. The wall of the convoluted tubules consists of two layers: connective tissue and epithelial, separated from each other by the basal membrane, which serves as a hemotesticular barrier.
The process of sperm formation is characterized by a clear cyclicity and continues throughout the reproductive life of the male. The spermatogenic epithelium of sexually mature males is multilayered and consists of spermatogoniums, spermatocytes of the 1st and 2nd orders, spermatids and sperm cells (Fig. 3). All these cells are connected to each other by the syncytial outgrowths of Sertoli cells, which have nutritional and secretory functions: they produce testicular fluid, produce a protein that binds testosterone, and the hormone inhibin, which inhibits the secretion of follicle-stimulating hormone (FSH).
Why people are interested in the size of animal genitals
If we delve into the teachings of Freud's psychoanalysis, we can learn that all mankind unconsciously seeks knowledge of his animal nature. Cognition can occur in a variety of ways. One of these is the study of the size and contemplation of the genitals in animals.
In animals the penis has a variety of structures, the common thing is that it always begins at the anterior wall. In some animals it is similar to the human organ, but in others it is different. It is also important that the sexual organ in all vertebrates developed only once, and not in several stages, as previously thought. Penis sizes in animals are approximately equal to their body size, but there are exceptions.
Elephant
The elephant's penis size reaches 2 meters and has an S-shaped curve. For an animal's body size, the approximate ratio is 1:4. Let us imagine for a moment that if a human also had this ratio, the size of his penis would be 45 centimeters.
Horse
A horse's penis has a diameter of 11 to 15 cm, and a length of 50 to 80 cm. When aroused, the head of the penis is mushroom-shaped.
Lion
A representative of the feline family has a penis size of 26 cm in the aroused state. This is not much, if we consider the size in relation to the body of its owner. On the organ itself there are spines, which serve to activate ovulation in the lioness.
Bear
Brown and polar bears have a bone at the base of their reproductive organ. On average, the length of their penis is 18 to 18.8 cm. Scientists are of the opinion that for female bears size did not play a minor role, because for the continuation of the species they chose a partner based on the size of his penis.
Interesting facts
- It is a well-known fact that lions are among the most active males. But in fact, this is not the case. The lion simply has no other options. The female can demand coitus every 30 minutes. Refusing to eat, she is ready to copulate for several days in a row. If the male fails, he is quickly replaced, and this is fraught with expulsion from the pride.
- The first time the bed bugs copulate, the male pierces a hole in any place he likes with his sharp penis.
- A sea elephant in a fit of passion can break its mate's skull.
- Walruses, when excited, pounce on the female and can trample her to death.
- Drones have a sexual relationship once in a lifetime. After coitus, the organ of the drones ruptures in the bee and soon its host dies.
- The loyalty of swans knows no bounds. But the list can be completed. Gibbons, wolves, foxes, beavers and even mice are famous for their lifelong loyalty. The first place is held by the deep-water oystercatcher. The male gnaws into her back with his teeth, connects to her circulatory system and grows into her body.
- Many reptiles have two reproductive organs.
- The hargonaut octopus tears off one of its eight tentacles, fills it with sperm, and sends it on a free swim.
- A female chimpanzee can copulate with more than 40 partners during heat.
- The hamster is the leader in the number of sexual acts per day. The number of his ejaculations can exceed 50 per hour.
Almost all mammal species have a bone in their reproductive organ. In science, this bone is called the baculum. It is an auxiliary tool for mating primates, rodents, predators and others. In the course of evolution, man has ceased to feel the need for this bone.
The length of the penis, the duration of sexual intercourse does not always depend on the total body size of the animal. But mother nature has thought of everything to the smallest detail. A man just has to study it and wonder how brilliantly simple everything is.