Adaptations of cardiac muscle.

Adaptations of cardiac muscle.

• The intercalated discs allow fast transmission of impulse from one fiber to the another by allowing rapid passaged of ions. This allows spread of an impulse through the muscle.
• The numerous blood capillaries quickly deliver oxygen and nutrients to the muscles and remove wastes to allow the muscles to contract without fatigue.
• The fibres contain action and myosin which contract.
• The fibres branch and cross-connect with each other allowing the entire heart to behave as a unit.

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