Ovary (figures 108-110) - is a paired female sex gland weighing 6.8 g and placed on either side of the uterus. It belongs to the glands of the mixed

Ovary

Ovary (figures 108-110) — is a paired female sex gland weighing 6.8 g and placed on either side of the uterus. It belongs to the glands of the mixed secretion: as the endocrine gland it produces (under the control of the hypothalamus and pituitary) hormones that regulate processes of ripening the ovum, fertilization, fetal development in the uterus during pregnancy, childbirth, and determines the secondary female sex characteristics (development of mammary glands, body hair of female type, a woman's voice); as the exocrine glands it ensures the formation of female gametes — ova. The newborn girl already has more than a million primary ova (oocytes). All they are shipped in special vials with liquid — follicles (from the Latin “a bag”) (figures 110, 111). 2/3 of ova die even before a girl reaches puberty. During the life of a woman matures 400-500 ova.
Having reached the puberty, a girl becomes a woman, and her body begins to form mature ova.

In the ovary cut (diagram 110) can be seen mature and immature follicles, in which, as in "incubator" mature ova. A mature follicle with mature ovum is called the antral follicle (diagram 111). Taken from http://worldofschool.org

Diagram 108. The structure of the female reproductive organs: 1 — colon; 2 — a bunch; 3 — bladder; 4 — pubic symphysis; 5 — the clitoris; 6 — a small sexual lips; 7 — labia lip; 8 — fringe; 9 — fallopian tube; 10 — follicle containing an egg matured; 11 — ovary; 12 — en ligament of the ovary; 13 — the uterus; 14 — the cervix; 15 — the urethra; 16 — rectum; 17 — vagina
Diagram 109. The structure of the uterus with ovaries and pipes: 1 — vagina; 2 — the cervix; 3 — opening of the cervical canal; 4 — body of the uterus; 5 — ovary; 6 — trumpet; 7 — ampoule tube; 8 — uterine portion of the tube; 9 — follicles; 10 — egg; 11 — fringe
Diagram 110. Ovary in cut: 1 — immature follicles; 2 — antral follicle; 3 — medulla; 4 — cork substance
Diagram 111. Antral follicle: 1 — sheath of the follicle; 2 — granular layer; 3 — radiant crown; 4 — ovum
Categories:
Questions:
  • Show the relationship of the ovaries structure and functions.

  • Explain the biological essence of ova maturation.

  • What biological functions perform ovarian hormones?