ANIMAL PHYSIOLOGY
MUSCLE ANIMAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A hard outer covering of the body
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A skeleton without hard parts
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Tissues that contract or relax to create movement
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Large structures that are filled with fluids that help shape an animal
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Detailed explanation-1: -Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts. The tissue is highly cellular and is well supplied with blood vessels.
Detailed explanation-2: -How Your Muscles Contract. Your muscles contain fibers called myosin. Depending on how you need to use your muscles, the myosin fibers either tighten up and shorten or loosen up and stretch out. Myosin is also responsible for muscle contractions like your heartbeat that happens at regular intervals.
Detailed explanation-3: -The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist. One way to remember which muscle is the agonist – it’s the one that’s in ‘agony’ when you are doing the movement as it is the one that is doing all the work.