The SA node sends out regular electrical impulses from the top chamber )the atrium) causing it to contract and pump blood into the bottom chamber (the ventricle).
Stress response model
explained- :)))
A disease that results from and invasion of microoranisms is called an infectious disease. Hope I helped! good luck.
the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.
Medium malnutrition refers to deficiencies or excesses in nutrient intake, imbalance of essential nutrients or impaired nutrient utilization. The double burden of malnutrition consists of both undernutrition and overweight and obesity, as well as diet-related noncommunicable diseases.
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