HUMAN HEART
and its
significance
1|Page
, Table of Contents
Introduction
Structure of Human Heart
External structure of the human heart
Structure of the Heart Wall
Internal structure of the Human Heart
Chambers of the Heart
Blood Vessels
Valves
Difference between arteries and veins
Anatomy of Human Heart
Function of heart
Types of circulation
Working of Human Heart
Heart rate
Disorders of Human Heart
Signs and Symptoms
Types of Heart diseases
Cardiovascular risk factors
Management & Treatment
Prevention
Regulation of cardiac activity
Good diet for a Human Heart
Conclusion
2|Page
, INTRODUCTION TO THE HUMAN HEART
The human heart is one of the most important organs responsible for sustaining life. It is a
muscular organ with four chambers. The size of the heart is the size of about a clenched fist.
The human heart functions throughout a person’s lifespan and is one of the most robust and
hardest working muscles in the human body.
Besides humans, most other animals also possess a heart that pumps blood throughout their
bodies. Even invertebrates such as grasshoppers possess a heart like pumping organ, though
they do not function the same way a human heart does.
Position of heart in human body
The human heart is located between the lungs in the thoracic cavity, slightly towards the left
of the sternum (breastbone). It is derived from the embryonic mesodermal germ layer.
3|Page
, STRUCTURE OF THE HUMAN HEART
The human heart is divided into four chambers, namely two ventricles and two atria. The
ventricles are the chambers that pump blood and the atrium are the chambers that receive
blood. Among these both the right atrium and ventricle make up the “right heart,” and the left
atrium and ventricle make up the “left heart.” The structure of the heart also houses the
biggest artery in the body – the aorta.
The right and the left region of the heart are separated by a wall of muscle called the septum.
The right ventricle pumps the blood to the lungs for re-oxygenation through the pulmonary
arteries. The right semilunar valves close and prevent the blood from flowing back into the
heart. Then, the oxygenated blood is received by the left atrium from the lungs via the
pulmonary veins. Read on to explore more about the structure of the heart.
4|Page
and its
significance
1|Page
, Table of Contents
Introduction
Structure of Human Heart
External structure of the human heart
Structure of the Heart Wall
Internal structure of the Human Heart
Chambers of the Heart
Blood Vessels
Valves
Difference between arteries and veins
Anatomy of Human Heart
Function of heart
Types of circulation
Working of Human Heart
Heart rate
Disorders of Human Heart
Signs and Symptoms
Types of Heart diseases
Cardiovascular risk factors
Management & Treatment
Prevention
Regulation of cardiac activity
Good diet for a Human Heart
Conclusion
2|Page
, INTRODUCTION TO THE HUMAN HEART
The human heart is one of the most important organs responsible for sustaining life. It is a
muscular organ with four chambers. The size of the heart is the size of about a clenched fist.
The human heart functions throughout a person’s lifespan and is one of the most robust and
hardest working muscles in the human body.
Besides humans, most other animals also possess a heart that pumps blood throughout their
bodies. Even invertebrates such as grasshoppers possess a heart like pumping organ, though
they do not function the same way a human heart does.
Position of heart in human body
The human heart is located between the lungs in the thoracic cavity, slightly towards the left
of the sternum (breastbone). It is derived from the embryonic mesodermal germ layer.
3|Page
, STRUCTURE OF THE HUMAN HEART
The human heart is divided into four chambers, namely two ventricles and two atria. The
ventricles are the chambers that pump blood and the atrium are the chambers that receive
blood. Among these both the right atrium and ventricle make up the “right heart,” and the left
atrium and ventricle make up the “left heart.” The structure of the heart also houses the
biggest artery in the body – the aorta.
The right and the left region of the heart are separated by a wall of muscle called the septum.
The right ventricle pumps the blood to the lungs for re-oxygenation through the pulmonary
arteries. The right semilunar valves close and prevent the blood from flowing back into the
heart. Then, the oxygenated blood is received by the left atrium from the lungs via the
pulmonary veins. Read on to explore more about the structure of the heart.
4|Page
