The male reproductive system consists of internal and external genitalia. The external genitalia includes scrotum and penis; The internal genitalia includes gonad (testis), vas deferens (epididymis, vas deferens, ejaculatory duct and urethra) and accessory glands (seminal vesicle, prostate and urethral gland). Female ovary, fallopian tube, uterus, vagina, etc. The reproductive organs of human beings and higher animals are necessary for sexual behavior, so they are also called sex organs. Female reproductive system consists of vagina, which is a linear tubular muscle tissue connecting vulva and uterus. There are reticular capillaries in its muscles, which will expand and congestion during sexual intercourse. Usually, the vaginal wall is closed, and it will only expand when inserting and producing tampon-type menstrual paper or penis. The vagina is about 7 cm long and can stretch itself during sexual intercourse; The upper end is connected with the cervix. The front of the vagina is the bladder, the back is the rectum, and the periphery is protected by tough pelvis and muscles. Unless the vagina is injured or underdeveloped, the vagina can have sexual intercourse regardless of its shape or size. Therefore, if the vagina is normal, but it is very difficult during sexual intercourse, it must be caused by psychological factors. For example, fear before sexual intercourse leads to contraction of vaginal muscles, so the penis cannot be inserted and sexual intercourse cannot be carried out. The vaginal mucosa is pink, and a small amount of liquid can seep out, which forms leucorrhea in the same shape with some uterine secretions to keep the vagina moist. At the same time, because it is weakly acidic, it can prevent pathogenic bacteria from reproducing in the vagina, so the vagina has self-purification function. Long-term use of various lotions to wash the vagina will kill vaginal bacilli that are beneficial to the body. Washing the lower body with alkaline shower gel or clean water will also reduce local resistance and increase the chance of infection. Daily cleaning can use weak acid female care solution with ph4. The uterus is shaped like an inverted pear, with different sizes and the volume equivalent to a human fist. It consists of muscles, with a hollow organ in the middle, which is located in the pelvis. The front view is triangular with a layer of endometrium inside. Adult women's endometrium will fall off periodically with bleeding, that is, menstrual cramps. The uterus is the uterine body, and the lower part is the cervix. The cervix is thin, and the gap between the uterine body and the cervix is wide and hollow. The lower end of the cervix is the vagina; The uterus usually clings to the bladder at 90 degrees to the vagina; When the bladder expands, it will lean backwards, which is called uterine retroversion. The uterine body is connected with the fallopian tube.
Fallopian tubes are two thin tubes located above the uterus, extending from the upper end of the uterus to the ovary to connect with the ovary, so as to receive the eggs discharged from the ovary. The fallopian tube is the place where sperm and eggs meet for fertilization, and the contents in the tube also nourish the fertilized eggs that will be transported to the uterus.
Ovary is two oval organs, where eggs are produced, which is equivalent to male testicles.