1. Describe the structure and function of cardiac muscles. 2. Why is blood known as the fluid connective tissue? 3. What is the composition and function of lymph? 4. What is a neuron?
Answers
➤ Answer
Question 1
Describe the structure and function of cardiac muscle.
Answer 1
The cells of cardiac muscle are cylindrical, branched, uninucleated and involuntary. They contract and relax rapidly and rhythmically throughout the life time.
Eg - contraction and relaxation of heart musles helps to transport blood to various parts of our body.
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Question 2
Why blood is known as the fluid connective tissue ?
Answer 2
Blood flows and carries various substances from one part of the body to the other. It carries oxygen and food to all cells. It also collects waste from all the part of the body and carries them to the liver and kidney for disposal. Hence blood is known as the fluid connective tissue.
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Question 3
What is composition and function of lymph ?
Answer 3
Lymph is a colourless fluid present in the blood. The basic function of lymph is to carry absorbed fats to different parts of the body. They also provide nourishment and nutrition to those tissues where blood cannot reach.
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Question 4
What is neuron ?
Answer
The cells of nervous tissue are known as neuron or neuron is a unit of nervous tissue ( brain, spiral cord, and nerves ) A neuron consists of cell body with nucleus and cytoplasm. Usually each neuron has a single long part called axon and many short branched parts know as dendrites.