(2) Testis 1 is the main sex organ and gonad of men, which can produce sperm and secrete androgen; I The ovary is the main sex organ of women and the gonad of women, which can produce eggs and secrete estrogen. Therefore, human gonads include 1 testis and I ovary, whose main functions are to produce germ cells and secrete sex hormones.
(3) Sperm produced by male testis enters vagina, slowly passes through uterus, and meets eggs produced by ovary in fallopian tube. Sperm and eggs combine to form fertilized eggs, so fertilized eggs are formed in fallopian tube.
(8) Menstruation is due to the periodic changes of ovary and endometrium, and the periodic necrosis and shedding of endometrium rupture blood vessels and cause bleeding.
(1) Testis 1 is the main sex organ and gonad of men, which can produce sperm and secrete androgen. After puberty, under the action of androgen, boys grow beards, prominent Adam's apple, muscular and deep voice.
(6) The difference between male and female reproductive organs is called primary sexual characteristics. In adolescence, the third gender difference between men and women is called the second sexual characteristic. Male secondary sexual characteristics are mainly manifested as long beard, prominent Adam's apple and loud voice. Women's secondary sexual characteristics are mainly characterized by broad pelvis, developed mammary glands and high pitch. Therefore, it can be judged that it is a baby boy by the reproductive organs (belonging to the primary sexual characteristics) and that the doctor is a woman by the high notes (belonging to the secondary sexual characteristics).
So the answer is: (1) scrotum and testis.
(2) 1 Testis I Sex Hormones of Ovarian Germ Cells
(3)6? Tubal?
(8) endometrium
(1) Testicular androgen 1
(6) one? two