Question

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1 arteries explain and veins and capillaries explain in points
2 heart explain in points

Answer 1

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Blood vessel :-

ARTERIES

1.They carry oxygenated blood away from the heart.

2. All the arteries except pulmonary artery carry oxygenated blood .

3.Pulmonary artery carries deoxygenated blood from the ventricles to the lungs .

4.Arteries have thick , elastic muscular walls .They are branch into arteries and end in capillaries .

5.Arteries are deeply situated and carry blood under high pressure .

________________________________

VEINS

1.A vein carries deoxygenated blood towards from heart .

2. All the veins except pulmonary vein carry deoxygenated blood.

3.Veins have thin and less muscular walls ..

*Small veins are called venules .These are formed from capillaries and join to form veins ..

4.Blood flows smoothly and at the low pressure.

5.Can be seen from the surface of the skin.

______________________________

CAPILLARIES :-

1.They are microscopic vessels that carry blood from arterioles to small veins .

2.The wall of a capillary is formed of a single layer of endothelial cells.

____________________________________

2.HEART :-

Structure of heart -

1.Hollow , muscular organ .

2.It beats non stop .

3.Pumping muscular organ.

4.It receives blood and pumps it to various body organs .

5.Its wall is made up of cardiac muscles .

6.Have four chambered .

Functions of heart :-

1.Heart is composed of cardiac muscles which contract and relex rhythmically.Contraction of heart called systole and relaxation of heart is called diastole.One heartbeat or cardiac cycle includes one systole and one diastole .Heart of an adult male beats 70 to 70 times per minutes.One cardiac cycle is completed in about 0.8 seconds , whereas pulse beats are75 per minute.It is called pace maker.

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Answer 2

ARTERIES

1.They carry oxygenated blood away from the heart.

2. All the arteries except pulmonary artery carry oxygenated blood .

3.Pulmonary artery carries deoxygenated blood from the ventricles to the lungs .

4.Arteries have thick , elastic muscular walls .They are branch into arteries and end in capillaries .

5.Arteries are deeply situated and carry blood under high pressure .

________________________________

VEINS

1.A vein carries deoxygenated blood towards from heart .

2. All the veins except pulmonary vein carry deoxygenated blood.

3.Veins have thin and less muscular walls ..

*Small veins are called venules .These are formed from capillaries and join to form veins ..

4.Blood flows smoothly and at the low pressure.

5.Can be seen from the surface of the skin.

______________________________

CAPILLARIES :-

1.They are microscopic vessels that carry blood from arterioles to small veins .

2.The wall of a capillary is formed of a single layer of endothelial cells.

____________________________________

2.HEART :-

Structure of heart -

1.Hollow , muscular organ .

2.It beats non stop .

3.Pumping muscular organ.

4.It receives blood and pumps it to various body organs .

5.Its wall is made up of cardiac muscles .

6.Have four chambered .

Functions of heart :-

1.Heart is composed of cardiac muscles which contract and relex rhythmically.Contraction of heart called systole and relaxation of heart is called diastole.One heartbeat or cardiac cycle includes one systole and one diastole .Heart of an adult male beats 70 to 70 times per minutes.One cardiac cycle is completed in about 0.8 seconds , whereas pulse beats are75 per minute.It is called pace maker.

Thanks