1. Reproductive organs of female dogs: The structure and location of reproductive organs of female dogs:

Ovary: Located in the lower area of ​​the waist, below the 4th to 5th lumbar vertebrae, there are two oval ovaries, one at each end of the left and right uterine horns. They are connected to the uterus by the ovarian ligament and are in contact with the funnel-shaped umbrella of the fallopian tube. Its function is to produce eggs and secrete hormones. The structure of the ovary is composed of cortex and is surrounded by a membrane.

Fallopian tube: It is the tube that connects the ovary and the uterus. After the follicles mature in the ovary, they move along the fallopian tube and enter the uterine horn.

Uterus: It is the place where the fetus develops. The uterus is a muscular organ with a hollow center. It is connected to the fallopian tube forward and leads to the vagina backward. It has the bladder below and the rectum above. Most of the uterus is in the abdominal cavity and a small part is in the pelvis. The entire uterus is divided into one body, one neck, and two horns. The dog's uterine body is very short and the uterine horns are very long. From the appearance, the uterus looks like the English letter "Y".

Vagina: It is the passage that communicates with the uterus and discharges the fetus and urine. There is the rectum above, and it is in contact with the bladder and urethra below. The structure of the vagina has two layers, one is the longitudinal muscle fiber layer, and the other is the circumferential muscle fiber layer. Its mucous membrane is pleated and elastic, but has no glands.

Vulva: It is located between the anus and pubic bone. Its shape is a vertical slit with labia on both sides. The upper ends of the lips join at an acute angle, and the lower ends of the two lips join together round and thick. Its structure has a very thin outer skin, smooth and colored, with many sebaceous glands and sweat glands inside. There is a layer of striated muscle under the skin, which contracts the vagina.

2. Reproductive organs of male dogs:

Testicles and epididymis: There is a pair of testicles located in the scrotum. They are oval in shape and slightly flattened on both sides. They are mainly composed of curved fine tubes. These fine tubes are composed of the glandular tissue of the testicles and their function is to produce sperm. .

The epididymis is closely connected to the testis. It is a curved tube. The head is connected to the testicular output duct, and the tail is connected to the vas deferens. Its function is to allow the sperm discharged from the testicular fine duct to remain here for a period of time, so that the sperm development can be more rapid. Full and more complete, while the secretions of the epididymis help sperm activity.

Vas deferens: It is shaped like a duct and is composed of developed smooth muscles, so it has the function of ejaculation. One end is connected to the tail of the epididymis, and the other end is located in the upper part of the bladder. It travels to the pelvic urethra through the seminal vesicles and is discharged from the urethra during ejaculation.

Prostate (prostate): Located at the continuation of the bladder neck and urethra, it is also composed of glands and has a secretory function to enhance sperm motility. Penis: The penis is the copulatory organ, which is divided into three parts: the root of the penis, the body of the penis and the head of the penis. The penis is made of spongy tissue. The spongy tissue expands when the veins are filled with blood and becomes elastic, so the penis can increase in size or elongate. When the penis is in this state, it is called an erection. The end of the penis is a long glans, whichThere are small pieces of bone.

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