University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

180

Pages:

3
Author:

Mariam A. A.

Components of Blood • • • Haematocrit refers the percentage of red blood cells in the amount of blood taken out The above shows blood after it has been centrifuged Heparin is added to prevent coagulation Erythrocytes-45% • RBCs - Function: Carry oxygen around the body - Histological appearance: ✓ About 7 micro meter in diameter ✓ Pale centre Buffy Coat-1% • Platelets - Function: Coagulation (helps with stopping bleeding) - Histological appearance: ✓ No nuclei ✓ Very small (2-4 micrometres in diameter) ✓ Basophilic/purple appearance • Basophils - Function: are associated with allergic reactions. They contain cytoplasmic granules, which contain heparin, histamine and substances that promote inflammation. - Histological appearance: ✓ S shaped or 2 lobes ✓ Diameter 14-16 micrometre ✓ Has large granules • Eosinophils - Function: Eliminates worms and parasites that are too large for phagocytosis. This is done because they have granules that contain toxic chemicals in granules when they bind to them (degranulation) - Histological appearance: ✓ Large and pink ✓ Diameter 12-17 micrometre ✓ Nuclei has two lobes • Neutrophils - Function: Engulf bacteria by phagocyte - Histological appearance: ✓ Nuclei have 2-5 lobes ✓ Number of lobes decreases with age ✓ 12-14 micrometre • T-lymphocytes - Function: Directly destroy their target cells by releasing chemicals that punch holes in the victim cell - Histological appearance: ✓ Large nucleus • B-lymphocytes - Function: antibody Production - Histological appearance: ✓ Large nucleus Plasma-54% • Water-35% - Function: ✓ Solvent ✓ Transport ✓ Controls blood volume and blood pressure • Plasma proteins - Function and types: ✓ Albumins-> regulate water balance ✓ Globulins: ➢ Alpha and beta: transport proteins for things that are not soluble and cannot be transported alone in blood. For example, transferrin for iron transport ➢ Gamma: antibody