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A testicle or testis (pl. testes) is the gonad in all male bilaterians, including humans, and is homologous to the ovary in females. Its primary functions are the production of sperm and the secretion of androgens, primarily testosterone. The release of testosterone is regulated by luteinizing hormone (LH) from the anterior pituitary gland.
Sertoli cells function to nourish the developing sperm cells. They secrete androgen-binding protein, a binding protein which increases the concentration of testosterone. There are two types: convoluted and straight, convoluted toward the lateral side, and straight as the tubule comes medially to form ducts that will exit the testis.
The main male sex organs are the penis and the scrotum, which contains the testicles that produce semen and sperm, which, as part of sexual intercourse, fertilize an ovum in the female's body; the fertilized ovum develops into a fetus, which is later born as an infant. The corresponding system in females is the female reproductive system.
Testosterone production can be compromised if something happens to one of the main players in this process — the hypothalamus, the pituitary gland, or the testes. ... brain that signals the ...
The main cause of infertility is due to obstructive azoospermia (OA). OA is a condition where there is a blockage in a male's reproductive tract, resulting in a lack of sperm in a male's ejaculate. This is mostly due to an absence of the vas deferens , which is thought to be caused by CFTR mutations.
The scrotum is in a tense state to regulate testicular temperatures. Major secondary sexual characteristics include a larger, more muscular stature, deepened voice, facial and body hair, broad shoulders, and the development of an Adam's apple. [5] An important sexual hormone of males is androgen, particularly testosterone. [6]
Since the testicles are the main producers of testosterone, any damage or condition affecting the organs can affect testosterone. ... which are parts of the brain that tell the testicles to ...
Leydig cells release a class of hormones called androgens (19-carbon steroids). [8] They secrete testosterone, androstenedione and dehydroepiandrosterone (DHEA), when stimulated by the luteinizing hormone (LH), which is released from the anterior pituitary in response to gonadotropin releasing hormone which in turn is released by the hypothalamus.