Blood GCSE

4,768 views

Published on

Blood GCSE standard

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
4,768
On SlideShare
0
From Embeds
0
Number of Embeds
3,069
Actions
Shares
0
Downloads
20
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Blood GCSE

  1. 1. Blood Wednesday, 11 June 2014 10:56
  2. 2. Red blood cells • Carry oxygen from lungs to body tissue. • There are 5 000 000 in 1mm3 of blood. • They are adapted in the following ways: (1) Size – thick diameter but thin width. They just fit through a capillary but the surface to volume ratio is large so they can absorb a lot of oxygen. 10:56
  3. 3. 10:56
  4. 4. Red blood cells (2) Shape – they are concave discs – this give greater surface area. (3) No nucleus – leaves more room for haemoglobin – also no mitochondria or ribosomes. (4) Haemoglobin – this is a protein that carries oxygen becoming oxyhaemoglobin. 10:56
  5. 5. 10:56
  6. 6. Haemoglobin 10:56
  7. 7. Oxyhaemoglobin 10:56
  8. 8. White blood cells • Defend against diseases. • They ingest bacteria and viruses. • They produce antibodies. 10:56
  9. 9. Human blood under microscope 10:56
  10. 10. Platelets • Platelets are small cells that allow blood to clot. • This stops bleeding and prevent bacteria from entering the body. 10:56
  11. 11. Plasma • This is the straw coloured liquid in the blood. • Over 90% of plasma is water. • This dissolves: (1) food – amino acids and glucose (2) cholesterol – from the liver (3) hormones – from glands (4) antibodies (5) water – to kidneys (6) waste products like carbon dioxide and lactic acid 10:56
  12. 12. Plasma 10:56

×