Nerve Supply to the heart and Blood vessels ~ Medical diseases and trems ,symptoms causes TREATMENT

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Nerve Supply to the heart and Blood vessels

             NERVE SUPPLY TO THE HEART AND BLOOD VESSELS

         There are to type of nerve fibres supply to the heart and blood vessels .

  1. SYMPATHETIC NERVE FIBRES -

          The has been arise from spinal cord. Stimulation of sympathetic nerve fibres cause -

                 * Increase heart rate.

                 * Increase force of contraction .

                 * Increase peripheral resistance.

                 * cardiac output .

                 * Increase blood pressure .

                 * Vasoconstriction pf blood vessels and vasodilation of coronary artery.

     - Sympathetic system 

                     🠟

       Stimulatory system 

                      🠟

       Fight or flight response 

                      example- Fear , exercise, stress , sadness.

    2.PARA SYMPATHETIC NERVE FIBRES-

           They has been arise from brain cranial nerve and vagus nerve. Stimulation of vagus nerve cause-

                 * Decrease heart rate .

                 * Decrease force of contraction.

                 * Decrease cardiac output .

                 * Decrease blood pressure .

                 * Decrease peripheral resistance.

                 * vasodilation of blood vessels and vasoconstriction of coronary artery .

            Example - Relaxation, sleep, Happiness .

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