Discuss the composition of blood and the main functions of its various components.
BiologyClass 9CBSEAnswered 13 May 2026
Answer
Blood is a type of fluid connective tissue composed of a liquid matrix called plasma, and formed elements including red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
1. Plasma: Transports water, nutrients, hormones, waste products, and proteins.
2. Red Blood Cells: Contain hemoglobin and are responsible for oxygen transport.
3. White Blood Cells: Involved in the body's immune defense, fighting infections.
4. Platelets: Essential for blood clotting and preventing excessive bleeding.
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