Circulatory System of Man
ICSE · Class 10 · Biology
Complete topic list for Circulatory System of Man in ICSE Class 10 Biology. Key concepts, sub-topics, and what to focus on for board exams.
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1. Circulatory system and body fluids
- The circulatory system is needed because body cells are not directly in contact with the external environment.
- Its main functions are transport of oxygen, carbon dioxide, nutrients, hormones, and wastes.
- It also helps in homeostasis, defence, and temperature regulation.
2. Blood and plasma
- Blood is a fluid connective tissue.
- Normal blood volume is 4.5 to 5.5 litres in a woman and 5 to 6 litres in a man.
- Blood is slightly alkaline with pH 7.4.
3. Red blood cells and haemoglobin
- Red blood cells are also called erythrocytes.
- RBCs are biconcave discs.
- They measure about 8 micrometres in diameter and 2 micrometres in thickness.
4. White blood cells and their types
- White blood cells are also called leucocytes.
- WBCs are nucleated, colourless, and mostly amoeboid.
- They help in defence by phagocytosis and antibody production.
Key Concepts
Central concept: Circulatory System
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