The presentation titled " The Working of the Human Heart" provides a comprehensive overview of the intricacies involved in the functioning of the human heart. Through visually engaging slides and concise explanations, the presentation delves into the anatomy of the heart, highlighting its vital structures such as the chambers, valves, and blood vessels. It further elucidates the concept of blood circulation, emphasizing the heart's role as a powerful pump responsible for propelling oxygen-rich blood throughout the body. Additionally, the cardiac cycle is explored, shedding light on the synchronized contractions and relaxations that enable the heart to efficiently distribute blood. By unraveling the mysteries of the human heart, this presentation aims to foster a deeper understanding of its remarkable workings and the significance of maintaining cardiovascular health.

1. By Rahila kazi
Structure and Functions

2. OBJECTIVES :
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Structure of the heart
Function of the heart
Working of the heart
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♥ Evaluation

3. Heart is present almost at centre in
thoracic cage.
It is present behind the ribs, between two
lungs and slightly inclined on left side.

4. The heart is the size of a human fist The heart weighs
about 360 grams

5. It is covered by a
double layered
peritoneal membrane.
A fluid is present
between two
membranes due to
which heart is
protected from friction
and mechanical
shocks.

6. Human heart is a
muscular organ. It is
made up of involuntary
cardiac muscles. They
contract and relax with a
definite rhythm. This is
called as beating of
heart

7. Internally, heart is
divided into left
and right compartments
by a vertical
partition.

8. Each of those
compartments
is again divided
into two
chambers.
Thus, in all, heart
consists of four
chambers
1 2
3 4

9. Upper chambers
are called
as atria (singular -
atrium)
1 2
3 4

10. The lower
chambers as
ventricles.
1 2
3 4

11. Functions of The heart
• Pumping Blood
• Regulating blood
pressure
• Circulating
hormones
• Providing energy

12. • Pumping blood: The heart is
responsible for pumping blood
throughout the body, delivering
oxygen and nutrients to the body's
cells and carrying away waste
products.
• Regulating blood pressure: The
heart helps regulate blood pressure
by adjusting the force of its
contractions and the diameter of
blood vessels.

13. • Circulating hormones: The
heart produces hormones that
help regulate various body
functions, such as blood
pressure and fluid balance.
• Providing energy: The heart
requires a constant supply of oxygen
and nutrients to function properly,
which it receives from the blood it
pumps. In turn, the heart supplies
energy to the body's cells through the
circulation of blood.

14. Working Of The Human Heart

15. The right atrium
receives
deoxygenated
blood from
different parts of
the body through
the superior
vena cava,
inferior vena
cava, and
coronary sinus.
Pulmonary
veins bring
oxygenated
blood from
the lungs to
the left
atrium.
Both the right and the left auricles pump blood into the right and left ventricles.

16. From the right ventricle, the pulmonary arteries supply deoxygenated
blood to the lung

17. From the left
ventricle, the
Aorta carries
the
Oxygenated
blood to the
various organs
of the body.
This process happens over and over again to pump blood in the body

19. The Human Heart Crossword Puzzle
The Heart
1
2
3 4
5
6 7
8
9 10
11
12
13
14
Across
1. prevents back flow
of the blood into right
atrium
2. receives
deoxygenated blood from
the body
6. takes oxygenated
blood from the lungs to
the left atrium
8. Body's largest artery
9. Your heart is
located in the ____
10. Your heart
circulates blood through
___ pathways
11. responsible for
pumping oxygen
depleted blood to the
lungs
The Heart
1
2
3 4
5
6 7
8
9 10
11
12
13
14
Across
1. prevents back flow
of the blood into right
atrium
2. receives
deoxygenated blood from
the body
6. takes oxygenated
blood from the lungs to
the left atrium
8. Body's largest artery
9. Your heart is
located in the ____
10. Your heart
circulates blood through
___ pathways
11. responsible for
pumping oxygen
depleted blood to the
lungs
12. Your heart is one
giant ____
13. Carries
deoxygenated blood from
the right ventricle to the
lungs
14. Brings
deoxygenated blood from
the body to the heartS
4. also known as the
mitral valve, permits
blood to flow one way
only
5. recieves oxygenated
blood from the left
atrium and pumps it
through the aorta
7. oxygen-rich blood
The Heart
1
2
3 4
5
6 7
8
9 10
11
12
13
14
m
12. Your heart is one
giant ____
13. Carries
deoxygenated blood from
the right ventricle to the
lungs
14. Brings
deoxygenated blood from
the body to the heartS
Down
3. vein that carries
4. also known as the
mitral valve, permits
blood to flow one way
only
5. recieves oxygenated
blood from the left
atrium and pumps it
through the aorta
7. oxygen-rich blood
from the lungs enters the
left atrium through
2
3 4
5
6 7
8
9 10
11
12
13
14
t
rom
to
ry
ugh
e
12. Your heart is one
giant ____
13. Carries
deoxygenated blood from
the right ventricle to the
lungs
14. Brings
deoxygenated blood from
the body to the heartS
Down
3. vein that carries
deoxygenated blood from
lower body to the heart
4. also known as the
mitral valve, permits
blood to flow one way
only
5. recieves oxygenated
blood from the left
atrium and pumps it
through the aorta
7. oxygen-rich blood
from the lungs enters the
left atrium through
pulmonary vein
12
13
14
10. Your heart
circulates blood through
___ pathways
11. responsible for
pumping oxygen
depleted blood to the
lungs
12. Your heart is one
giant ____
13. Carries
deoxygenated blood from
the right ventricle to the
lungs
14. Brings
deoxygenated blood from
the body to the heartS
Down
3. vein that carries
deoxygenated blood from
lower body to the heart
4. also known as the
mitral valve, permits
blood to flow one way
only
5. recieves oxygenated
blood from the left
atrium and pumps it
through the aorta
7. oxygen-rich blood
from the lungs enters the
left atrium through
pulmonary vein

20. References
• https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja
&uact=8&ved=2ahUKEwj4h9Ommvr9AhUHV2wGHS18ARUQFnoECAwQAw&url=
https%3A%2F%2Fmy.clevelandclinic.org%2Fhealth%2Fbody%2F21704-
heart&usg=AOvVaw0Y-qpzcPkfBwSmlp63kBG9
• https://byjus.com/biology/human-heart/
• https://www.britannica.com/science/heart
Thank - you