The Circulatory System and Heart chapter explains the structure, function, and regulation of blood circulation in humans and animals. It is a core topic in Zoology and Human Biology, essential for Class 11–12 students, NEET aspirants, and undergraduate learners, forming a direct link between anatomy, physiology, and health.
In this section, you will study:
Components of the circulatory system
Structure and working of the human heart
Blood vessels and types of circulation
Cardiac cycle and regulation of heartbeat
Blood pressure and its regulation
Disorders of the circulatory system
Transport of gases, nutrients, and wastes
NCERT-aligned explanations, diagrams, MCQs, and exam-oriented questions
The content is structured to build conceptual clarity, improve physiological understanding, and prepare students for school examinations, NEET, and undergraduate assessments.
Develop a strong foundation in circulatory system physiology to understand how blood circulation supports life, health, and homeostasis.
Q. What is the function of red blood cells?
A.
To fight infections
B.
To transport oxygen
C.
To clot blood
D.
To regulate body temperature
Solution
Red blood cells transport oxygen from the lungs to the body's tissues and return carbon dioxide to the lungs.
