Ovaries and testes produce and secrete hormones, so they are considered endocrine glands. The Leydig cells in the testes secrete testosterone and... View Article
Ovarian follicles secrete various hormones, which regulate their own development as well as ovulation and other events. They provide an essential... View Article
A single primary spermatocyte gives rise to four sperms after meiosis. Primary spermatocyte undergoes first meiotic division to produce two... View Article
The secondary oocyte is released into the peritoneal cavity near the fimbriated end of the fallopian tube, i.e. infundibulum. The released... View Article
Ovulation is triggered by a surge in luteinizing hormone or LH. It is a gonadotrophin secreted by the anterior pituitary. It induces ovulation... View Article
The rupture of the Graafian follicle results in ovulation. After ovulation, the Graafian follicle transforms into the corpus luteum. The corpus... View Article
Oogenesis starts at the embryonic stage itself. Primitive germ cells start dividing to form oogonia. No more oogonia are produced after birth. By... View Article
FSH (follicle-stimulating hormone) is a gonadotrophin secreted by the anterior pituitary. It stimulates follicular development in females and... View Article
Primary oocyte is a diploid cell, which is formed from the oogonia or gamete mother cell. Primary oocyte gives rise to secondary oocyte after the... View Article
Oogenesis is the formation of a mature female gamete or ovum. Meiosis I occurs in the primary oocyte and gets arrested at the prophase I... View Article
Polar bodies are formed at the time of oogenesis. They contain very little cytoplasm so they usually degenerate. The egg cell gets the most of... View Article
In humans, meiosis 2 occurs in the secondary oocytes or spermatocytes leading to the formation of ootid or spermatid, respectively, which are... View Article
Corpus luteum is formed after ovulation. The ruptured Graafian follicle transforms into the corpus luteum. The Corpus luteum is important to... View Article
Spermatogenesis is controlled by various hormones. LH induces the synthesis and secretion of androgens from the Leydig cells. FSH and androgens... View Article
The secondary oocyte is produced by meiosis I in the primary oocyte. It starts the second meiotic division immediately but gets arrested at... View Article
No, primary oocytes are diploid cells. They are produced by mitotic division in oogonia. Meiosis I occurs in the primary oocytes leading to the... View Article
Yes, a gamete possesses a haploid nucleus in a diploid organism. Sperm and ovum both contain a haploid nucleus. Gametes are formed by meiosis in... View Article
Acrosome is present at the anterior end of the elongated nucleus, present in the sperm head as the cap-like structure. It is derived from the... View Article
Polar bodies fragment and degenerate. Polar bodies are formed by unequal cytoplasmic division at the time of meiosis in oocytes. They are tiny... View Article
