Circulatory System - blood
- Created by: cassiarh01
- Created on: 18-04-18 18:26
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- Circulatory System - blood
- Red blood cells carry oxygen
- From the lungs to all the cells in the body
- Shape gives them a large surface area for absorbing oxygen
- Haemoglobin - allows red blood cells to carry oxygen
- Don't have a nucleus which leaves more space for carrying oxygen
- White blood cells defend against infection
- Part of your immune system
- Some can change shape to gobble up unwelcome microorganisms
- They DO have a nucleus
- Platelets help the blood to clot at a wound
- Small fragments of cells with no nucleus
- Stops all your blood pouring out
- Stops any microorganisms getting in
- Plasma is the liquid that carries everything in the blood
- Carries;
- Red & white blood cells
- Food molecules - glucose and amino acids
- Waste products - CO2 and urea
- Hormones
- Proteins
- Carries;
- Red blood cells carry oxygen
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