Summary OCR GCSE PE - Section 1 Anatomy and Physiology

deoxygenated blood travels from heart to lungs
pulmonary
becomes oxygenated, travels back to heart
Double circulatory sy
oxygenated blood travels to the whole body,
systemic
becomes deoxygenated, travels back to heart

aorta have haemoglobin, which binds to oxyg
forms oxyhaemoglobin, transports oxyg
pulmonary artery to body cells


high pressure blood (except pulmonary)
arteries
small lumen

muscular walls

transports blood away from heart
low pressure blood
Pathway of air


oxygen in alveoli diffuses into capillaries
valves
and binds haemoglobin in red blood cells
to form oxy haemoglobin
Gas exchange transports blo
carbon dioxide in capillaries diffuses
into alveoli to be expired