3. How does your heart work?
Your heart acts as a pump. The heart is like a tubular bag of thick
muscular tissues having four chambers: two auricles and two
ventricles which are connected to different arteries and veins.
Arteries carry pure blood from the heart to all parts of the body and
veins carry impure blood from various parts of the body to the heart.
The right auricle receives blood from the body. As it contracts, blood
flows into the right ventricle. When this contracts, it pumps the
blood to the lungs. The left auricle receives blood from the lungs and
passes it to the left ventricle. This pumps blood to the rest of the
body.
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