The Male Reproductive System

Penis Male organ used in

reproduction Two parts are shaft

and glands Delivers sperm and

urine through the urethra

http://kidshealth.org/misc/movie/bodybasics/male_repro.html

Scrotum Sac-like structure that

holds the testicles and the epididymises

It is used to monitor and control the temperature of the testicles so sperm can be produced

Scrotum maintains a temperature 2-3 degrees lower than body temperature

http://www.malecontraceptives.org/methods/images/heat.jpg

Testicles Small oval organs

held by the scrotum that make/produce testosterone and sperm

Part of the endocrine system

Must maintain 2-3 degrees lower than body temperature to produce sperm

http://www.malecontraceptives.org/methods/images/heat.jpg

Sperm Is the male gamete Consists of a head, a

mid-piece, and a tail Nucleus lies in the

head along with chromatin and genetic information

Is a haploid cell and when joined with the haploid egg cell becomes a diploid

http://www.babble.com/CS/blogs/strollerderby/sperm%2001.jpg

Testosterone Main hormone produced

in a male’s body Kick-starts the making of

sperm Takes a major part in

puberty Causes male to develop

a deeper voice, leaner and larger muscles, and more hair

Considered to be an anabolic steroid http://itech.dickinson.edu/chemistry/wp-content/uploa

ds/2008/04/testosterone.jpg

Epididymis Epididymis: a set of twisting ducts (tubes)

that connects to the vas deferens Where sperm are stored Sperm mature in the epididymis Serves as a pathway from the testicles to

the vas deferens for sperm

http://wikipedia.org/#epididymis

Vas deferens Vas deferens:

transports sperm to the urethra in expectation of ejaculation

Contractions in the vas deferens propel the sperm onward

http://wikipedia.org/#epididymis

Semen and Seminal fluid Semen: The fluid

that carries sperm and seminal fluid

Seminal fluid: made in the prostate gland and the seminal vesicles

Nourishes sperm and carries it outside the penis during ejaculation http://spermomax.net/sperm.jpg

Prostate gland

Produces parts of semen Contains smooth muscles

that help force out sperm during ejaculation

To work, the prostate gland need hormones

http://en.wikipedia.org/wiki/Prostate

Seminal vesicles Sac-like

accessory gland Attaches to the

side of the vas deferens

Produces parts of semen

http://en.wikipedia.org/wiki/Seminal_vesicle

Urethra Tube-like structure

which connects the bladder of an organism to the outside of its body

Passageway for semen Passageway for urine

http://www.malecontraceptives.org/methods/images/vas_urethra.gif

Pituitary Gland Located near the

brain Triggers the

production of testosterone in males using hormones

Controls the other endocrine system glands

http://www.gynaeonline.com/images/pituitary_gland.gif