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प्रश्न
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उत्तर
Circulatory system: It is a system of organs that takes part in the flow of materials in the body of an organism inside an extracellular fluid.
Circulatory system in humans:
(a) The right atrium receives deoxygenated blood from all the parts of the body through large veins called vena cava.
(b) When the right atrium is full of blood, it contracts and the blood is forced into right ventricle.
(c) When the right ventricle is full of blood, it contracts and the blood is pumped into the pulmonary trunk.
(d) From right ventricle, the pulmonary artery carries the blood to the lungs for oxygenation.
(e) The oxygenated blood returns to the heart via pulmonary veins that empty into the left auricle.
(f) When the left auricle contracts, the blood passes into the left ventricle by the opening of bicuspid valve.
(g) On contraction of the left ventricle, the blood is pumped into the artery called aorta.
(h) The aorta branches into vessels which transports blood to the heart and all the body parts.
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संबंधित प्रश्न
fill in the blanks with suitable functions: Eustachian Tube and ______
Note the relationship between the first two words and suggest the suitable word/ word for the
fourth place:
Lubb: Atrioventricualr valves :: dup: …………………
what is Lymph nodes?
Give reason for the following:
Blood flowing away from the stomach and intestines is put into circulation via the liver and
not directly.
What is haemoglobin? State the consequences of deficiency of haemoglobin in our bodies.
Blood consists of two parts - a liquid part and a cellular part. Name these parts and briefly write about them
During surgical operations or during accidents, the patient may be given blood from outside to save his life. What is the technical name of this process? Briefly explain the precautions to be taken in this process.
Describe, in brief, the circulatory system in human beings.
Use your brain power!
How is the air that we inhale purified in our body?
Identify the normal haemoglobin count in human females.
