Lesson 4B (Part 2) Flashcards
How many lobules are in each testis?
200-300
What are in each lobule?
1 to 4 convoluted loops composed of germinal epithelial cells known as seminiferous tubules
What are between the seminiferous tubules?
Groups of interstitial cells
What are interstitial cells also known as?
Cells of Leydig
What do the cells of Leydig do?
Secrete the hormone testosterone after puberty
What happens at the upper pole of the testis?
The tubules combine to form a single tubule
How long are the tubules?
6m
- repeatedly folded and tightly packed into a mass
What are the repeatedly folded and tightly packed into a mass known as?
Epididymis
How does the sperm leave the epididymis?
Through the vas deferences in the spermatic cord
What passes through the spermatic cord? (2)
- Blood vessels
2. Lymph vessels
Mediastinumtestis
Mass of connective tissue at the back of the testis that
encloses the rete testis
Rete testis
A network formed in the mediastinum testis by the seminiferous
tubules
How is the epididymis presented?
Single, tightly coiled tube enclosed in a fibrous casing
Where is the epididymis located?
Lies along the top and behind the testis
What are the 3 parts of the epididymis?
- Head
- Body
- Tail
What is head of the epididymis connected tot eh testis by?
The efferent ductules
What is the tapered inferior portion of the epididymis continuous with?
The vas deferens
What are 2 embryological remnants that are found toward the superior pole of the testis?
- Appendix testis
2. Appendix epididymis
What is the vas deferens also called?
Ductus deferens
Where does the vas defererens extend from?
The tail of the epididymis
How can the palpation of the vas deferens be classified as? (3)
- Smooth
- Moveable chord
- Thick muscular walls
What does the vas deferens do?
Help in propelling sperm through the duct system
Where does the vas deferens go? (2)
- Ascends from the scrotum and passes through the inguinal canal as part of the spermatic cord
- Extends over the top and down the posterior surface of the bladder
What does the ampulla do?
Joins the duct from the seminal vesicle to form the ejaculatory duct
What suspends the testes in the scrotum?
The spermatic cords
What does each spermatic cord contain? (5)
- A testicular artery
- Testicular veins
- Lymphatics
- A deferent duct
- Testicular nerves
What is the spermatic cord covered by?
A sheath of smooth muscle and connective and fibrous tissues
Where does the spermatic cord extend through?
The inguinal canal
Where does the spermatic cord attach to the testis?
On the posterior wall
