Part A
(i) Heartbeats
(ii) Pulmonary artery
(iii) Upper chambers
(iv) Left ventricles
(v) Valves
(vi) Blood in body
-(vii) Cardiac output
(viii) Systolic blood pressure
(ix) 'O' blood group
(x) Capillaries
Part B.
(a) Bicuspid and Tricuspid
(b) 72 times per minute
(c) 5 litres approximately
(d) Atrium
(e) Stroke volume x heart rate
(1) 120 mm/Hg
(3) Universal donor 9
(h) Carries blood to body
(i) Pump blood to body
(j) Smallest blood vessel
ort Answer Type Questions :
1. Explain the working of heart.
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Answer:
The working of heart:
The pumping of the heart is controlled by special fibres that conduct electrical signals to the various chambers. The right side of heart pumps the blood to the lungs, where it recieves oxygen. Blood enters the left side of heart from the lungs and the hurt pumps the oxygen - rich blood around the body.
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