The human heart consists of four chambers - two upper atria and two lower ventricles separated by muscular walls. The left atrium opens to the left ventricle and right atrium to the right ventricle. Valves between the atria and ventricles ensure blood flows in only one direction. Arteries carry blood away from the heart while veins bring blood back to the heart. Valves at the beginning of arteries also prevent backflow of blood from the arteries into the heart.

3. Human heart consist 4 chambers

4. The upper two chamber are called atria
and lower two are called ventricle
This two atria and ventricles are separated
by muscular walls.
Left atrium opens to the left ventricle and
right atrium opens to the right ventricle.
There are valve between the atrium and
ventricle
They ensure the flow of blood only one
direction

5. The blood vessels that carry blood
from the heart are called arteries,
 and blood vessels that bring blood
to the heart are called veins.
Valves are also present at the
beginning of the arteries which
prevent the backward flow of blood
from arteries to the heart

6. THANKS
Shameena
J.S.

7. THANKS
Shameena
J.S.