MI's, Myocardial Infarctions, or Heart Attacks while can happen at random, are greatly exaggerated by disorders that are themselves exaggerated by sedentary lifestyles. Arteriosclerosis (hardening of Artery walls) and Atherosclerosis (plaque buildup on artery walls) are two disorders that contribute a lot towards MI's, and these both can be prevented via physical activity.
Artery walls are literally muscles, so with physical activity artery wall hardening can be prevented. Plaque buildup usually results in clots called Thrombi, which can eventually occlude the coronary blood vessels. These plaques consist of cellular debris, platelet and blood cells, and lipids called cholesterol an accumulation of which is called Hyperlipidemia. Exercise can greatly decrease the lipid count in the blood stream (as well as a healthy diet). Additionally by exercising you can decreases blood pressure which contributes to clot formation, when it is excessive (Hypertension) by actually scratching the artery walls (clots don't start all of a sudden).
Answer:
One reason frogs are often chosen to be dissected is that their bodies provide a good overview of the organ systems of a complex living thing. The organs present in a frog, and the way they are laid out in the body, are similar enough to humans to provide insight for students about how their bodies work.
Explanation:
That statement is true
Aerobic exercise such as swimming and running will burn a lot of calories from our body
And in order to burn calories, our body need supply of oxygen.
That's why our heart tend to beat really fast when we do Aerobic exercise, it's because our heart need to pump a lot of blood to deliver oxygen to the muscles
