Sperm Structure and Oogenesis

Which part of the sperm contains the nucleus with densely coiled chromatin fibers?

What provides energy for the vigorous movement of sperm?

During which stage of oogenesis do primary oocytes get suspended at diakinesis of Prophase-I?

At what stage does oogenesis start during the embryonic stage?

At puberty, how many primary oocytes are left in each ovary?

What do the secondary follicles transform into?

What is formed by organizing the theca layers into an inner theca interna and outer theca externa?

How are millions of gamete mother cells or oogonia produced?

What is the function of the acrosome in a sperm?

At what stage do primary follicles get surrounded by more layers of granulosa cells and a new theca?

Sperm Structure and Function

The head of the sperm contains the nucleus, which is compacted with densely coiled chromatin fibers.
The midpiece of the sperm is responsible for providing energy necessary for vigorous movement, utilizing mitochondria to produce ATP.

Oogenesis (Development of Oocytes)

Primary oocytes get suspended at diakinesis of Prophase I during the diplotene stage of meiosis.
Oogenesis begins during the embryonic stage, where oogonia rapidly proliferate and enter meiosis.

Oocyte Count and Follicle Development

At puberty, each ovary contains approximately 400,000 primary oocytes remaining from the original pool formed.
The secondary follicles transform into tertiary follicles (or Graafian follicles) as they mature.

Follicle Organization

The formation of an inner theca interna and outer theca externa occurs as these layers organize around the growing follicle.

Gamete Production

Millions of gamete mother cells, or oogonia, are produced through mitotic divisions during early fetal development.

Acrosome Function

The acrosome of a sperm contains enzymes that facilitate penetration of the oocyte, aiding in fertilization.

Follicular Development

Primary follicles get surrounded by additional layers of granulosa cells along with the formation of a new theca during their maturation process.

Learn about the structure of sperm, including the head, middle piece, and tail, as well as the process of oogenesis which leads to the formation of mature female gametes. This quiz covers essential details about sperm structure and the oogenesis process.