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PRODUCTION OF GAMETES

A process of a male and female sex cell joining together- reproduction/fertilisation

Sex cells (gametes) are produced in specialised sex organs (gonads)

The fusion of a female and male gamete at fertilisation

results in a single cell- zygote

Gonads are produce gametes (primary sex

organs)

Secondary sex organs- store,

bring the gametes and support the developing baby

MALE REPRODUCTIVE SYSTEM

Male gonads

(sex organs) consist of two testicles (testes). Within each, the gametes/spermatozoa; sperm are produced

Testes are

held and supported in a skin covered pouch- scrotum

Scrotum

internally is divided into two sacs

Production

and development of the sperm requires a temperature about 2c lower than body

The testes

lie outside the body cavity in the scrotum

In the cold –

contraction of smooth muscles fibres in the wall of the scrotum, moves the

testes closer to the body(tempt slightly higher)

Muscles relax

(move it away from body) to keep it cooler

Internally

the testis- divided between 200-300 lobules/ compartments filled w fine tubes (seminiferous

tubules – are lined with cells that produce the gametes)

The tubules

join together to form a short straight tubule-> ducts-> leave the testis and into

the epididymis

~*~*~*~*~*~*~**~*~ insert testis

diagram~*~*~*~*~*~*8============D

Between the

seminiferous tubules, interstitial cells secret male hormone testosterone

epididymis- highly folded tubule that fits against the rear surface of each testis in which sperm from the testis enter the tubule of the epididymis

sperm are stored there for a month allowing their maturation.

tubule of the epididymis becomes the vas deferens/sperm duct carrying sperm away from the testis

extends upwards

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