CBC Grade 7 Notes in Kenya What are the Components of Blood
CBC Grade 7 Notes in Kenya What are the Components of Blood
Blood in Grade 7 CBC studies is composed of four main parts: plasma (liquid), red blood cells (oxygen transport), white blood cells (defense/immunity), and platelets (clotting). It is specialized tissue making up ~7-8% of body weight, containing ~55% plasma and ~45% cellular components that transport nutrients/waste
1.1 Components of Blood
Blood is made up of the following components:
- Plasma
- Red blood cells
- White blood cells and Platelets
Key Components of Blood
- Plasma (55%): A yellowish liquid, mostly water, that transports nutrients, hormones, proteins, and waste products.
- Red Blood Cells (RBCs/Erythrocytes): Contains hemoglobin, which picks up oxygen from lungs and delivers it to body tissues, while carrying carbon dioxide back.
- White Blood Cells (WBCs/Leukocytes): Part of the immune system that destroys pathogens like bacteria and viruses.
- Platelets (Thrombocytes): Tiny cell fragments that form clots at the site of a wound to prevent bleeding.
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