Chapter 18 – Body Fluids And Circulation
Body Fluids and Circulation is an important chapter in Class 11 Biology that explains how blood and lymph transport nutrients, gases, hormones, and waste materials throughout the body. It focuses on the structure and functions of blood, lymph, heart, and blood vessels.
The chapter describes the composition of blood (plasma, RBCs, WBCs, and platelets), blood groups (ABO and Rh factor), and the process of blood clotting. It also explains the structure of the human heart, cardiac cycle, electrocardiogram (ECG), and the pathway of blood circulation through pulmonary and systemic circulation.
Key topics such as double circulation, cardiac output, and regulation of heart activity are discussed in detail. Understanding this chapter is essential for mastering human physiology concepts and is highly important for CBSE board exams and NEET preparation.
Body Fluids and Circulation NCERT
- Chapter 19 – Excretory Products And Their Elimination