Which of the following statements is true about red blood cells?

Protect the body from diseases

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Carry oxygen to every part of the body

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Biconcave in shape and have no nucleus

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Both B and C

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Solution

The correct option is D Both B and C
Erythrocytes (RBCs) are circular, biconcave, non-nucleated cells. The cytoplasm of RBCs contains the respiratory pigment called haemoglobin which helps in the transport of oxygen. It does not protect us from any disease. White blood cells present in the blood help to protect us from the disease.
So, the correct answer is option D.

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Question 17
Which of the following statement(s) is/are true about the heart?

(i) Left atrium receives oxygenated blood from different parts of the body while right atrium receives deoxygenated blood from lungs.

(ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs.

(iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts.

(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body.

(a) (i)
(b) (ii)
(c) (ii) and (iv)
(d) (i) and (iii)

Q. Red blood cells help in transporting oxygen to all parts of the human body.

Which of the following is correct about the aorta?

I: It leaves the left ventricle carrying oxygenated blood to all parts of the body

II: It leaves the left auricle carrying the oxygenated blood to all parts of the body

III: It carries blood pumped from the heart to lungs

IV: It is the largest artery in the body

Q. Which of the following statement(s) wrong with regard to heart?
A. Left atrium receives deoxygenated blood from different parts of the body while right atrium receives deoxygenated blood from the lungs.
B. Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.
C. Left atrium receives oxygenated blood from lungs while left ventricle pumps oxygenated blood to different parts of the body.
D. Pulmonary vein carries deoxygenated blood to the lungs and pulmonary artery brings oxygenated blood towards the heart.

Q. Draw the diagram of human heart and label the following parts which
(i) receives deoxygenated blood from vena cava,
(ii) send deoxygenated blood to lung through pulmonary artery,
(iii) receives oxygenated blood from lungs and
(iv) sends oxygenated blood to all parts of the body through aorta.

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