Question

Define muscular tissue. Classify and explain different types of muscles with the help of suitable diagrams.​

Answer 1

Answer:​

• The muscular tissue form the contractile tissue of the body and are made of muscle cells or muscle fibres. ​
• Muscle cells are large and also elongated, hence called as muscle fibres. ​
• The three types of muscular tissues are as follows:​

1. Striated Muscles​
2. Smooth Muscles​
3. Cardiac Muscles​

Striated muscles​

• Striated muscles are also known as striped, skeletal, or voluntary muscles. ​
• The striated muscle fibres cells are cylindrical, unbranched, long and non-tapering. ​
• Striated muscle cells are multinucleated. ​
• Striated muscles help in locomotion and all other voluntary movements of the body.​

Smooth muscles​

• Smooth muscles are also known as unstriated, visceral, or involuntary muscles.​
• Smooth muscles occur as bundles of spindle-shaped cells or fibres.
• These are held together by loose connective tissue. Each muscle cell is enclosed in a plasma membrane. ​
• Smooth muscles do not contract by our will, so they are also called involuntary muscles. ​

Cardiac muscles​

• Cardiac muscles present in the heart show characteristics of both striated and smooth muscles. ​
• Cardiac muscles are composed of branched fibres and the branches join to form a network. ​
• The cardiac muscle fibre is surrounded by sarcolemma, a centrally located nucleus (i.e., each cell is uninucleate). ​
• The contraction and relaxation of the cardiac muscles help to pump and distribute blood to different body parts.​