The heart is a muscle that pumps blood through the blood vessels and that is the essential function. It is the main and central organ of the circulatory system.
The heart weights between 200 and 425 grams. It is located between lungs, in the middle of the chest and it is divided into four chambers in humans, other mammals, and birds heart.
Stress comes from being over worked or excessively involved in things that is too much to take , while asthmatic attack is due to a chronic problem that partaken on the person lungs and heart condition
