Question

Write the external features of haert ?

Answer 1

Answer:

The heart,external features. ... The heart • The heart is composed of 4 chambers :– – Right atrium, – Right ventricle, – Left atrium, – Left ventricle. • Blood returning to the heart enters the atria, and is then pumped into the ventricles

Answer 2

$\star\bold\red{Answer:-}$

=>The heart is enclosed in a protective sac.

=> The pericardium, which also contains a small amount of fluid.

=> The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.

=>The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node.

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