Questions and Answers
What is the primary function of the scrotum in relation to the testes?
What type of cells are involved in providing nutrition to germ cells within the seminiferous tubules?
How many lobules does each testis contain approximately?
Which cells in the testes are responsible for the synthesis of androgens?
Signup and view all the answers
What is the approximate size of an adult testis?
Signup and view all the answers
Which cells undergo meiotic divisions to lead to sperm formation?
Signup and view all the answers
Study Notes
Anatomy of the Testes
- Testes are located outside the abdominal cavity within a pouch known as the scrotum.
- The scrotum regulates the temperature of the testes, maintaining it 2-2.5°C lower than the normal body temperature, which is essential for sperm production (spermatogenesis).
Structure and Dimensions
- Each adult testis is oval, measuring approximately 4-5 cm in length and 2-3 cm in width.
- The testis is enveloped in a dense covering for protection.
Testicular Lobules and Seminiferous Tubules
- Each testis contains roughly 250 compartments termed testicular lobules.
- Within each lobule are 1 to 3 highly coiled seminiferous tubules, which are the sites of sperm production.
Cell Types within Seminiferous Tubules
- Seminiferous tubules are lined with two key cell types:
- Male germ cells (spermatogonia) that undergo meiotic divisions to form sperm.
- Sertoli cells that nourish the germ cells during their development.
Interstitial Spaces and Leydig Cells
- The areas outside the seminiferous tubules are known as interstitial spaces, which contain:
- Small blood vessels for nutrient and waste transport.
- Interstitial cells, commonly known as Leydig cells.
- Leydig cells are responsible for synthesizing and secreting androgens, which are testicular hormones vital for male reproductive function.
Additional Cellular Presence
- Other immunologically competent cells are present within the interstitial spaces, playing a role in the immune response within the testes.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the structure and function of the testes, including their location within the scrotum and the importance of temperature regulation for spermatogenesis. Learn about the anatomical features, such as the testicular lobules and their role in reproductive physiology.
