powepoint presentation

1. STRUCTUREOFHUMAN
HEART
PRESENTEDBY ASHA
LEKSHMI.V

2. Heart is a completely muscular
organ
Human heart is a conical, hollow
organ located behind the sternum in
the thoracic cavity.

3. Heart is protected
by a double layered
membranous sac
called pericardium.
In between the
pericardial
membrane is the
pericardial space
which is filled with
pericardial fluid.
Human heart is four
chambered i.e., two
auricles and two
ventricles.

4. The auricles are the upper chambers
while the ventricles are the lower
chambers.
The auricles are thin walled and are
separated by inter auricular septum
and ventricles are thick walled which
is separated by interventricular
septum

5. The right auricles receives impure blood
from different body parts through two
large veins superior and inferior
venecava.
The left auricles receives pure blood
from the lungs by pulmonary veins.

6. From the right ventricles arises an artery
known as Pulmonary artery, which carries
deoxygenated blood to the lungs for
purification.

7. • From the left
ventricle arises a
main blood vessel
known as aorta
which carries pure
blood to various
body parts.
• The opening of the
pulmonary artery &
aorta are guarded
by semilunar valves.

8. Semilunar valves prevent the backward flow of
blood from the pulmonary aorta and artery to
their respective ventricles.
The right auricular ventricle valve is known as
tricuspid valve and the left auricular valve is
known as bicuspid valve.