This presentation explains the Heart and the amount of chambers it contain and also the Heart Valves

1. Esther N. Baah-Asante

2. Organs
Organ is defined as different types of tissues that
work as one to perform and accomplish specific
functions.

3. The Human Heart

4. The Heart
• The heart is a muscular pump that is made up of
cardiac muscle fiber that is mainly considered a
muscle instead of an organ.
• Heart has four chambers that beat an average of 60
to 100 beat per minute.
• The heart is located in the mediastinum in the chest
cavity.
• The heart is more on the left side of the chest
mediastinum than the right side.
• The heart is about as big as your fist and it lies behind
external.
• The tip of the heart at the lower edge is the apex.

5. Layers of the Heart

6. Layers of the Heart
• The heart is composed with three layers called the
endocardium which is the outer layer, myocardium
which is the middle layer of the muscular tissue and
epicardium which is the inner layer of the heart.
• Is covered by a protective sac called the pericardium
which is divided into two layers the visceral and
parietal pericardium.

7. The Heart Chambers

8. The Heart’s Chambers
• Right and left atria are the upper chambers of the
heart.
• Right and left ventricles are the lower chambers of
the heart
• They are divided by a wall called intertribal septum
and the interventricular septum.
• The atria are called receiving chambers of the heart.
• The ventricles are the pumping chambers of the
heart.

9. The Heart Valves

10. Heart Valves
 The heart contains four valves called the a tricuspid valve,
pulmonary valve, mitral valve and aortic valve.
 tricuspid valve also known as the atrioventricular valve
controls the opening between the right atrium and the right
ventricle. When blood enters the right ventricle it cannot go
into the atrium again.
 The prefix tri means its three and cusps means it has
three leaflet.
 Pulmonary valve is also known as the semilunar valve.
Prefix semi means half and lunar means moon which is
semilunar means half of the moon which is located
between the right ventricle and the pulmonary artery.

11. The Heart Valves Continue…

12. The Heart Valves Continued…
 The mitral valve also known as a bicuspid valve
showing that it has two cusps. The blood flow
through the atrioventricular valve then into the left
ventricle so it does not return to the left atrium.
 Aortic Valve also known as the semilunar valve is
located in between the left ventricle and the aorta.
When the blood departs from the left ventricle to the
aorta , it cannot return back to the left ventricle.

13. REFERENCES
 Fremgen, Bonnie F., and Suzanne S. Frucht. Medical
Terminology: A Living Language. Upper Saddle River, NJ:
Pearson Prentice Hall, 2009. Print.
 "Study: Human Heart Cells Regenerate During
Lifetime." - Health News. N.p., n.d. Web. 08 Sept. 2014
 "Angelina." 2011allsystemsgo -. N.p., n.d. Web. 08 Sept.
2014.
 "Aortic Stenosis : Learn About Symptoms and
Treatment." MedicineNet. N.p., n.d. Web. 08 Sept. 2014