Smooth muscles are present in the lining of all of the following except:
Correct answer: D. Heart
- A. Bladder
- B. Blood vessels
- C. Intestines
- D. Heart
Explanation
The heart is composed of cardiac muscle fibers.Blood vessels, intestines and bladder all have smooth muscles in their walls that enable their contraction and relaxation for continuous flow of material (blood, food, waste materials and urine) through them.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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