Circulatory System - The Blood
- Created by: GeorgiaHaworth
- Created on: 09-05-14 12:06
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- The Blood
- Red Blood Cells
- Carry oxygen from the lungs to all cells in the body.
- Concave shape.
- large surface area/more room for absorbing oxygen.
- No nucleus.
- large surface area/more room for absorbing oxygen.
- Contains a red pigment called plasma.
- In the lungs, haemoglobin combines with oxygen to become oxyhaemoglobin.
- In body tissue oxyhaemoglobin splits up into haemoglobin and oxygen, to release oxygen into the cells.
- White Blood Cells
- Defence against disease.
- Engulf harmful microorganisms
- Produce antibodies to fight microorganisms.
- Produce antitoxins to neutralise any toxins produced by the microorganisms.
- Unlike red blood cells, they do have a nucleus.
- Defence against disease.
- Platelets
- Small fragments of a cell that have no nucleus.
- They help the blood to clot a wound - to stop blood loss and prevent harmful microorganisms getting in.
- Lack of platelets can cause excessive bleeding and bruising.
- Lack of platelets can cause excessive bleeding and bruising.
- Plasma
- Carries everything in the blood.
- Red blood cells.
- White blood cells.
- Platelets
- Nutrients like glucose and amino acids. (soluble products of digestion which are absorbed from the gut and taken to the cells of the body.
- Carbon Dioxide from the organs to the lungs
- Urea - from the liver to the kidneys
- Hormones
- Antibodies and antitoxins produced by the white blood cells.
- Carries everything in the blood.
- Red Blood Cells
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