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Circulatory system
- Pump is the heart
- Blood vessels
- Veins
- Thinner walls than arteries
- Carry low pressure blood
- Thinner walls than arteries
- Arteries
- Thick muscular walls to cope
with high pressure
- Carry blood away
from heart
- Thick muscular walls to cope
with high pressure
- Capillaries
- Permeable walls
- Transfer materials from
bloodstream to tissues
- Tiny
- Permeable walls
- Veins
- Red blood cells
- Tiny to fit
through small
capillaries
- Contain haemoglobin
- Haemoglobin produces
oxyhaemoglobin in oxygen rich
environments
- Haemoglobin are
made from iron
- That's why we need iron
- That's why we need iron
- Haemoglobin produces
oxyhaemoglobin in oxygen rich
environments
- Flattened-disc shape
- Gives large surface area :
volume ratio
- Have no nucleus
- Gives large surface area :
volume ratio
- Tiny to fit
through small
capillaries
- White blood cells
- Lymphocytes
- Produce antibodies
- Large nucleus
- Produce antibodies
- Phagocytes
- Engulf pathogens by
phagocytosis
- Job is to
engulf
pathogens
- Irregular shape
- Can
change
shape
easily
- Can
change
shape
easily
- Engulf pathogens by
phagocytosis
- Repel pathogens
- Lymphocytes
- Plasma
- Carries dissolved soluble materials
- Amino acids
- Urea
- Tissue fluid
- Antibodies
- Amino acids
- Straw coloured
- Carries dissolved soluble materials
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