How our excretory system works.

1. EXCRETORY
SYSTEM

2. Body functions produce WASTE
substances.
These substances pass into
the blood.
EXCRETION is the
elimination of waste
substances from the blood.
The excretion process is
carried out by the
EXCRETORY SYSTEM.

3. They filter the blood. Collect the waste
which make up urine.
The carry urine from the
kidneys to the bladder.
It stores the urine.
Urine is expelled through this
tube.

4. Sweat is a
liquid that
our body
secrets.
Sweat eliminates
excess heat when
our body is very hot
or when we exercise.
Sweat consist of water but
it also contains salts and a
small amount of waste
substances.
What does sweat consist of?
What is sweat?
What is sweat for?
When you sweat you should drink
a lot of water to replace it.

5. Sweat is formed here.
Pore
Sweat goes to outside of the body.