Cardiac Muscles MCQ - Practice Questions with Answers

Location- 

• These muscles are present in the walls of the heart and in the large veins like pulmonary veins and superior vena cava.

    
Structure- 

• These show characters of both striped and unstriped muscles.
• Each muscle fibre is a long and cylindrical structure having a definite sarcolemma. 
• Fibres contain a single nucleus in the centre.
• Fibres possess certain lateral branches that form a contractile network. 
• These lateral branches are called oblique bridges.
• Cardiac muscles have intercalated discs. 
• Intercalated discs function as boosters of contractions wave and permit the wave of muscle contraction to be transmitted from one cardiac fibre to another.

Functions- 

• Cardiac muscles are responsible for causing heart movements.