male reproductive system

1. REPRODUCTIVE SYSTEM
PRESENTED BY:
M.C.KNIRANDA
ASSISTANT PROFESSOR
SSNSR, SU.

4. MALE REPRODUCTIVE SYSTEM
Male external genital organs are as follows :

5. PENIS
• The penis is a copulatory organ of the external genitalia of the males.
The penis is the male organ used for both urination and sexual intercourse.
The penis is located above the scrotum. It is made of spongy tissue and
blood vessels.
The urethra passes through the penis.
Urine and semen both flow through the male urethra.
The ability of the penis to become firm and erect is caused by the presence of
erectile tissue.

6. • It consists of three parts –
root (radix)
body (shaft) and
glans.
• The core of the penis contains three erectile tissues, namely the
two corpora cavernosa and the corpus spongiosum.
PENIS

7. • The penis is responsible for reproduction as it conveys the seminal fluid and
the sperm, as well as for the sensations of sexual arousal and pleasure.
• Out of the state of sexual arousal, the penis is described as flaccid.
• Whilst during sexual arousal and consequential arterial congestion in the
erectile tissues, it is described as erect.
• The process of seminal fluid discharge is called the ejaculation.
PENIS

8. PARTS OF PENIS
•Root –
The root is the base of the penis.
It is the most proximal, fixed part of the penis.
It attaches to the wall of the abdomen.

9. • Body (shaft) –
The body has a shape like a tube or cylinder.
It consists of three internal chambers: the two larger chambers are the
corpora cavernosa, and the third chamber is the corpus spongiosum.
The corpora cavernosa run side by side, while the corpus spongiosum
surrounds the urethra.
PARTS OF PENIS

10. • (There’s a special, sponge-like erectile tissue inside these
chambers. The erectile tissue contains thousands of spaces. During
sexual arousal, the spaces fill with blood, and the penis becomes
hard and rigid (erection). An erection allows a man to have
penetrative sex. The skin of the penis is loose and stretchy, which
lets it change size when a person have an erection).

11. • Glans (head) –
the most distal part of the penis.
The glans is the cone-shaped tip of the penis.
A loose layer of skin (foreskin) covers the glans.
Healthcare providers sometimes surgically remove the foreskin
(circumcision).
PARTS OF PENIS

12. PARTS OF PENIS

13. Bulb of penis
• The bulb of penis is the bottom
portion, or base, of the penis.
• The bulb is located just above the
testicles.
• It contributes to the shape of the penis.

14. FUNCTIONS OF PENIS
• The primary functions of the penis are urinary and sexual.
• The sexual function of the penis can be described as two stages: erection and
ejaculation.
1. Urination - Urination is the release of urine from the body.
2) Erection - An erection is the stiffening of the penis caused by sexual arousal
and/or physical stimulation
3) Ejaculation – It is the discharge of semen from the penis.

15. PENIS

20. Epididymis (Reservoirs of Spermatozoa)
The epididymis is a highly folded tubule embedded in connective tissue
forming a comma shaped structure on posterolateral aspect of testis.
It has a head, a body, and a tail.
A confluence of 15–20 efferent ductules creates the head.
The ductules combine to form a single tube called the duct of epididymis at
the lower end of the head.

22. MALE INTERNAL GENITAL ORGANS
MALE INTERNALGENITALORGANS

23. Ductus Deference
 The ductus deference(also known as the vas deference) is a muscular
tube that runs from the lower end of the epididymis to the base of the
prostate, where it connects to the duct of the seminal vesicle to form the
ejaculatory duct.
 It is about 45 cm long.
 At the lateral region of the scrotum, it can be felt as a cord-like structure.

24. Seminal vesicles
• These are two sacs-like structure situated behind bladder. Each vesicle is
about 5 cm in length, 3-5 cm in diameter and its duct joins the duct of
ductus deference to form the ejaculatory duct.
• The seminal vesicle creates an alkaline fluid that is high in fructose and gives
sperm energy.
• Its function is to contract and expel their stored contents, seminal fluid,
during ejaculation..
• They ultimately provide around 70% of the total volume of semen.

26. Spermatic cord
• The spermatic cord refers to a collection of vessels, nerves and
ducts that run to and from the testes. They are surrounded by
fascia (sheets of connective tissue), forming a cord-like structure.
• begins in the inferior abdomen and ends in the scrotum.