Tuesday, July 6, 2010

Group: Rayner, Niklaus, Tim , See Toh, Johanan(Red Blood Cells

Organelle in Red Blood Cell are cytoplasm, cell membrane.
Cytoplasm - rich in hemoglobin, which is an iron-containing biomolecule that can bind oxygen and is responsible for the blood's red colour. It contains simple protein and iron pigment. It will turn redder when there is more oxygen.
Cell membrane - It aid in regulating their surface deformability, flexibility, adhesion to other cells and immune recognition. It also have three layers.
(Has no nucleus to maximize space to carry oxygen. Human red blood cells do reproduce by cell division. They are produced in the bone marrow. Immature erythrocytes have a nucleus but mature erythrocytes have no nucleus.)
Function of cell
-Controls pH. The pH of blood must remain in the range 6.8 to 7.4, otherwise it begins to damage cells.
- Transfer Oxygen to different parts of the body
- Transfer waste gas( carbon dioxide) to the lungs

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