Question

Atretic follicles are found in the
a. Fallopian tube
b. Uterus
c. Labia majora
d. Ovary

Answer 1

Hint: As we all know that females in humans release eggs every month and these eggs contain primary, secondary, tertiary and graafian follicles. The follicular cells surround the oocyte inside the follicle. The immature follicles are called atresia follicles and their degeneration can occur at any stage of development.

Complete answer:
• We know that all human females release eggs every month and these eggs are released from the ovaries of the females. There are millions of follicles in the ovaries before birth.
• The sectional view of the ovary shows the outer cortex and inner medulla and the cortex contain follicles in various stages of development.
• The immature or atretic follicle are those follicles which are present since birth and before attaining puberty they degenerate before maturation.
•The primary follicles are the one that has a developing oocyte or ovum surrounded by the follicular cells.
• This primary follicle matures into the secondary follicle which has more number of follicular cells and an additional layer called Theca.
• These follicles now mature into the tertiary follicles having a fluid filled cavity called Antrum.
• Lastly the tertiary follicle is developed into a graafian follicle which is the mature follicle and has large fluid filled cavity called liquor folliculi.
• Graffian follicles are also called atretic follicle as they bursts in middle of menstrual cycle under the influence of Luteinizing hormone and the leftover follicle turns into corpus luteum which is a mass of cell that regulates the menstrual cycle and early pregnancy.

Hence, the correct answer is option (D).

Note: Remember there are millions of follicles in the ovary before birth, however at puberty their number is decreased so that each ovary has almost sixty to eighty thousand functional follicles left only. This regression in the number of follicles is called Follicular Atresia.