📘 Chapter: Body Fluids and Circulation
💓 Topic: The Human Heart (Class 11 / NEET)
🌟 1. Introduction
The human heart is a muscular, four-chambered organ located in the thoracic cavity
between the lungs.
It is protected by a double-layered membrane called the pericardium.
🔹 2. Structure of the Heart
Size: About the size of a fist
Chambers:
Right atrium
Right ventricle
Left atrium
Left ventricle
Right side: Receives deoxygenated blood from body
Left side: Pumps oxygenated blood to the body
, 🔹 3. Major Blood Vessels
Vessel Name Function
Vena cava = Brings deoxygenated blood to right atrium
Pulmonary artery. = Carries blood from right ventricle to lungs
💓 Topic: The Human Heart (Class 11 / NEET)
🌟 1. Introduction
The human heart is a muscular, four-chambered organ located in the thoracic cavity
between the lungs.
It is protected by a double-layered membrane called the pericardium.
🔹 2. Structure of the Heart
Size: About the size of a fist
Chambers:
Right atrium
Right ventricle
Left atrium
Left ventricle
Right side: Receives deoxygenated blood from body
Left side: Pumps oxygenated blood to the body
, 🔹 3. Major Blood Vessels
Vessel Name Function
Vena cava = Brings deoxygenated blood to right atrium
Pulmonary artery. = Carries blood from right ventricle to lungs
