Question

Answer the question. 1-2 sentences
1. why is the heart considered a powerful machine
2. what is the difference between atria and ventricles in terms of their structure and function?
3. what is the function of blood vessels
4. what is the difference between an artery and vein
5. why are platelets important to the body?

Answer 1

Answer:

all these are mentioned in ncert first check it

Explanation:

both likhna padegaa dekh lo isse aacha

Answer 2

Explanation:

1. The heart was known as a powerful machine because it is the pumping organ of the circulatory system. And it don't get rest.
2. The atria stand for the upper chambers of the heart, while the ventricles are the lower chambers.Atria act as receptors of deoxygenated blood, while ventricles receive blood from the left atria and force it into the aorta.
3. Blood vessels are the channels or conduits through which blood is distributed to body tissues. The vessels make up two closed systems of tubes that begin and end at the heart. One system, the pulmonary vessels, transports blood from the right ventricle to the lungs and back to the left atrium.
4. Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.
5. Platelets, or thrombocytes, are small, colorless cell fragments in our blood that form clots and stop or prevent bleeding. Platelets are made in our bone marrow, the sponge-like tissue inside our bones.

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