10 Questions
What is the purpose of the scrotum in the male reproductive system?
To maintain the low temperature of the testes
What is the shape of each testis in an adult?
Oval
How many compartments are present in each testis?
250
What is the function of Sertoli cells in the seminiferous tubules?
To provide nutrition to the germ cells
What is the name of the cells that synthesise and secrete testicular hormones?
Leydig cells
What is the function of the male germ cells?
To undergo meiotic divisions finally leading to sperm formation
What is the region outside the seminiferous tubules called?
Interstitial spaces
What is the name of the ducts that connect the seminiferous tubules to the epididymis?
Vasa efferentia
What is the location of the epididymis in the male reproductive system?
Along the posterior surface of each testis
What is the temperature of the testes compared to the normal internal body temperature?
2-2.5°C lower
Study Notes
Testes Location and Function
- Testes are situated outside the abdominal cavity within a pouch called scrotum.
- Scrotum helps maintain a low temperature (2-2.5°C lower than internal body temperature) necessary for spermatogenesis.
Testes Structure
- Each testis is oval in shape, approximately 4-5 cm long and 2-3 cm wide.
- Testis is covered by a dense covering.
- Each testis has around 250 compartments called testicular lobules.
Testicular Lobules
- Each lobule contains one to three highly coiled seminiferous tubules where sperms are produced.
- Seminiferous tubules are lined with two types of cells: male germ cells (spermatogonia) and Sertoli cells.
Cell Functions
- Male germ cells undergo meiotic divisions to form sperm.
- Sertoli cells provide nutrition to the germ cells.
- Leydig cells (in interstitial spaces) synthesise and secrete androgens (testicular hormones).
Male Sex Accessory Ducts
- Seminiferous tubules open into vasa efferentia through rete testis.
- Vasa efferentia leave the testis and open into epididymis located along the posterior surface of each testis.
- Epididymis is part of the male sex accessory ducts, along with vas deferens.
This quiz covers the structure and functions of the testes, including their location, temperature regulation, and internal compartments. Learn about the importance of the scrotum and the components of the testicular lobules. Test your knowledge of the male reproductive system!
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