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Tissues — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceTissues5 Marks
Question
Describe the composition of human blood.
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Answer

Blood is a fluid connective tissue which circulates in our body. The main components of blood are plasma (55%) and blood corpuscles (45%).

Plasma is straw-coloured fluid which contains 85-90% water and 5-10% other substances like proteins, salts and hormones.

There are three types of blood corpuscles:

  • RBC (Red blood cells).
  • WBC (White blood cells).
  • Platelets.

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