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प्रश्न
What are the cellular components of blood?
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उत्तर
Blood is a fluid connective tissue. It is composed of plasma (fluid) and blood cells (corpuscles).
Cellular components of blood (blood corpuscles) constitute about 45% of blood volume.
Three types of blood cells are:
(i) Erythrocytes or red blood cells: They are most abundant blood cells. Normal RBC count is 5-5.5 million/mm3 in males and 4.5-5 million/mm3 in females) RBCs help in transport of gases and maintain blood pH.
(ii) Leucocytes or white blood cells: The normal WBC count is 5000-6000/mm3 of blood. They are involved in immune response of body and act as soldiers and scavangers.
(iii) Thrombocytes or blood platelets: There are about 2,50,000 platelets/mm3 of blood. They are involved in blood clotting.
संबंधित प्रश्न
Distinguish between Adipose and blood tissue
Name the following :
(a) Tissue which stores fat
Classify connective tissue and give one example of each type.
Give structure, types and functions in brief of the following:
Connective tissue
Name the tissues found:
at the joints of two bones
Write 'True or False' for the following statement:
The end of the bones is connected with ligaments.
Answer the following question.
Why do animals in cold regions have a layer of fat below their skin?
Non-shivering thermogenesis in neonates produces heat through ______.
Why blood is considered as a typical connective tissue?
Bone matrix is rich in
Which of the following helps in repair of tissue and fills up the space inside the organ?
A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will
Give reasons for
Branches of a tree move and bend freely in high wind velocity.
The two types of skeletal connective tissues are ______ and ______.
White blood corpuscles contain respiratory pigment hemoglobin.
Name the cartilage cells present in the matrix.
What is the role of RBC?
Umbilical cord blood is collected at the time of child birth and stored in stem cell banks? Reason out.
Which of the following statement is incorrect?
Statement I: Ligaments are dense irregular tissue.
Statement II: Cartilage is dense regular tissue.
In the light of the above statements, choose the correct answer from the options given below:
