male reproductive system

Male Reproductive System

Objectives:

-Identify the male reproductive system and their major parts. -Explain the functions of each parts. -Relate the structure of the male reproductive system to its function in reproduction.

Reproductive System is a term applied to the group of plant or animal organs that are necessary for or that are accessory to the reproductive processes.


The basic units of sexual reproduction are the male and female germ cells.

Reproductive SystemMale Reproductive System

* External organs

A. Penis - is a sensitive organ important to reproduction and urination and to sexual pleasure.


At its tip is the glands, which contains the urethral opening, through which urine passes.


The ridge that separates the glands from the body of the penis is called the corona.


The glands and the corona are the most sensitive parts of the penis.


The penis

contains three cylinders of tissue that run parallel to the urethra.


B. Scrotum is a

pouch that hangs below the penis and contains the two testes which produce sperm and are considered part of the internal genitalia.


The testes also are the primary producers of testosterone (male sex hormone) in men.


Inside the testes are about 1,000 semi niferous tubules that manufacture and store the sperm.


*Internal Sex Organs:

A. Vas Deferens

transports the sperm

from the epididymis

through the prostate,

after which the vas

deferens becomes

the ejaculatory duct.


Fluids from the prostate and seminal vesicles (small sacs that hold semen) combine with the sperm to form semen, a thick, yellowish-white fluid.


B. Testes- one of a pair of male sex glands that produce sperm cells.


Each testis contains about 800 narrow twisting tubes, called seminiferous tubules, that are lined with cells that, upon maturation, divide to form the sperm.


C. Epididymis a long tube coiled against the testis, where the sperm are stored and mature.


D. Prostate Gland chestnut-shaped male organ located next to the bladder and surrounding the urethra (the tube that carries urine from the bladder to the penis).


The prostate gland produces a secretion known as prostate fluid that makes up most of the liquid part of semen, which is discharged from the penis during sexual orgasm.


References:

The world of Science 5

Into the Future; Science and Health 5

BEC Handbook in Science 5

Encarta 2009