Advertisements
Advertisements
प्रश्न
Give reason, why a matured mammalian erythrocyte lacks nucleus and mitochondria?
उत्तर
A matured mammalian erythrocyte lacks a nucleus and mitochondria. The lack of a nucleus
increases the surface area-volume ratio of RBCs, thus increasing the area for oxygen absorption.
Also, the lack of a nucleus reduces the size of the cell, making it easy to flow through the blood
vessels and more cells can be accommodated in a small area.
The lack of mitochondria implies that the cell does not use any oxygen absorbed for respiration,
thus increasing the efficiency of the cell to transport oxygen as all the oxygen absorbed is
transported without any loss.
APPEARS IN
संबंधित प्रश्न
Aqueous humour, Vitreous humour, lris, Central canal
Is it true that your heart beats more than one lac times per day?
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
Artery and vein (direction of blood flow)
Differentiate between the following pair of terms: Vena Cava and Aorta
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
Describe, in brief, the circulatory system in human beings.
Name the main artery which carries blood to different parts of the body.
Complete the following sentence with appropriate word:
Beside food, oxygen and waste materials, circulatory system transports ________ to various parts of the body.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The walls of auricles are thicker than those of ventricles.
Which of the following cells are produced from reticulocytes?