Page 16 - Health & Physical edu- 8

b. Epididymis

There are innumerable thin ducts in each testes. These ducts are called seminiferous
tubules. The combination of all these tubules makes epididymis. It is in the form of
a curve just behind the testes. It includes long and curve type thin ducts and they
jointly form a single duct. The main function of this is to form matured sperms and

push the sperms towards vas deferens.
c. Vas Deferens

This part generates from epididymis and ends at ejaculatory duct. They are two in
number. This duct is 40 to 45 centimeter long. The main function of this is to pass
sperm to ejaculatory duct.

d. Seminal Vesicle

Seminal vesicles are situated at the back of the urinary bladder. It produces the

semen and provides nutrients to the sperms. It stores sperm before ejaculation.

e. Ejaculatory duct

The duct emerging from seminal vesicle and vas deferens jointly form ejaculatory
duct. So, this duct leading from seminal vesicle to prostate gland is named ejaculatory
duct. It is almost 2 centimeter long. The main function of this is to pass sperm
towards urethra for ejaculation.

f. Prostate gland:

This gland remains below the urinary bladder. It covers the initial portion of urinary
tract. Because of this, in case of enlargement of this gland, there is difficulty in
urination. The main function of this is to produce a greasy type of liquid that assists
the sperms to move. It helps to neutralize the acidic environment of urethra.

g. Urethra:

This part expands from the urinary bladder to the end of penis. Its length is almost

18 to 20 centimeter. Urination and ejaculation are the basic functions of urethra.

12 Health & Physical Education, Class-8