How is the work of the heart regulated?

The sympathetic part of the autonomic nervous system speeds up the rhythm of the heart, and the impulses of the vagus nerve slow down the heartbeat. Reflex slowdown of cardiac activity is also observed when pressing on the eyeballs – the ocular reflex. In a state of emotional and physical arousal, adrenal hormones such as adrenaline speed up the heart, while norepinephrine slows it down. The heart rate is also influenced by substances secreted by various organs of the body, which regulate the diameter of blood vessels, including coronary vessels, which provide blood supply to the myocardium.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.