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Blood System – Composition, Blood Cells, Functions, Groups & General Science Concepts

The blood system is an important part of General Science and human physiology. Blood is a specialized connective tissue that transports oxygen, nutrients, hormones and waste products throughout the body. It also plays a major role in immunity, temperature regulation, clotting and maintenance of internal balance. For CSS, PMS, PPSC, FPSC, CCE and PCS examinations, candidates should understand the composition of blood, functions of plasma, red blood cells, white blood cells, platelets, hemoglobin, blood groups and basic transfusion concepts.

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