Question

(2017)
1
-2
(i) Which parts of heart are in the diastolic phase?
Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram.
What type of blood flows through them.
(iii) What causes the heart sounds 'LUBB' and
'DUBB'?
(iv) Name the blood vessels that supply oxygenated
blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section
of an artery and a vein.
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Answer 1

Explanation:

1. (i)The part of heart are in the diastolic phase

is both in artiums and ventricles.

in the human being the diastolic pressure is about 80 mm.

iii) Arteries are the blood vessels that supply oxygenated blood to the heart muscles.