The first division of meiosis occurs in the female before she is

A secondary oocyte is released from the follicle at

Meiosis does not finish until after

In spermatogenesis, all haploid cells develop into

In oogenesis, haploid cells divide unequally, so tiny

are formed.

Only

ovum is produced.

As sperm travel through the female reproductive tract they undergo Capacitation.

Capacitation involves the removal of

and some

from the membrane above the

This makes the membrane more

and more permeable to

ions.

During fertilisation, the sperm head binds to the jelly coat of the oocyte. This triggers the entry of

ions into the sperm head.

The

of the sperm fuses with the membrane surrounding the

allowing enzymes to be released that digest the jelly coat.

The sperm membrane then fuses with the plasma membrane of the oocyte allowing the sperm

to enter the oocyte.

The kidneys are connected to the

by the

The testis is divided into several lobules each containing many

Between these are

which secrete testosterone.

The

join together to form a long coiled tube called the

where sperm are stored.

This leads to the

which carries sperm towards the urethra.

While the sperm is carried, secretions of

are added which make the sperm more motile.

The

produces an alkaline fluid to neutralise any acid remaining in the urethra.