The inner lining of the uterus is called the endometrium. The muscular wall of the
The vagina is a tubular canal connecting the cervix of the uterus with the outside.
The vagina serves as a birth canal and as an organ of copulation. (para 8-11c)
The external genitalia of the human female include the mons pubis, the labia
majora, the labia minora, the clitoris, and the vestibule. (para 8-11d)
The mons pubis is a mound of fat tissue, covered with skin and hair, in front of the
The labia majora are two folds of fatty tissue and skin which extend back from the
mons pubis and encircle the vestibule. The outer surfaces are covered with hair.
The labia minora are two folds of skin lying within the labia majora and also
The clitoris is a small projection of erectile tissue corresponding to the male penis.
During the first eight weeks of pregnancy, the developing organism is known as an
embryo. Thereafter, the developing organism is known as a fetus. At the time of
birth, the second delivery is that of the placenta and fetal membranes.
The secondary sexual characteristics of females include growth of pubic hair,
development of mammary glands, development of the pelvic girdle, and deposition
The primary sex organ of the human male is the testis. The testes are shaped like
eggs. Their location is within the scrotum. The scrotum is a sac of loose skin
attached in the pubic area of the lower abdomen. The scrotum provides a site
cooler than body temperature to maintain the viability of the spermatozoa. When
the air is too cold, muscles and muscular fibers draws the testes and scrotum
closer to the body to maintain warmth. Otherwise, the scrotum hangs loosely. The
testis produces male sex cells called spermatozoa. The testis also produces
chemicals, or male sex hormones, called androgens. (para 8-14)
The epididymis is a coiled tube whose function is to aid in the maturation of
spermatozoa. Its lining secretes a nutritive medium for spermatozoa. As the
spermatozoa pass through the nutrient, they mature. (para 8-15a)