Chemically straightening hair changes the shape of disulfide bonds, which alpha keratin protein; this is the second protein structure. However, as the hair continues to grow out, this keratin protein grows with it, thus outlasting the effects of the chemicals which change the shape of the protein.
Lifestyle is the causal factor a healthy or unhealthy cardiovascular system. Hence, it is important to keep tract on what you eat and practice during the day.
Some common types of cardiovascular diseases and its cause are:
<span>a. Coronary Heart Disease – this is the most common form of heart disease. It happens when arteries supplying blood to the heart narrow or harden from the build-up of plaque (fat and cholesterol). People who experience this condition will often feel chest pains, shortness of breath, and discomfort on the arms, shoulders, neck, and jaw. </span>
<span>b. Atherosclerosis – is a form of coronary heart disease where plaque builds up in the arteries causing low blood supply to the body. </span>
c. Arteriosclerosis – a condition where arteries narrow in size and harden through time
<span>d. Heart Failure – this condition occurs at a very slow rate usually caused by an injury to the heart muscle, uncontrolled high blood pressure, a heart attack, or the a heart valve fails to function. The weakened heart muscle then puts more effort in pumping blood to the body and when the heart can’t keep up with the pace, the heart just fails away. </span><span> </span>
I would say the respiratory system (the lungs) fail. The lungs are to receive oxygen and it sends it to the heart.
I am not much of a biology nerd but I am taking an educational guess.
All I can say that the lungs need oxygen. Without oxygen, the heart will stop pumping blood and you will be suffocating with this essential. That is why you should never smoke and actually take great care of your precious body.
No control variable
no hypothesis
only performed once
If it expands, shrinks, or stays the same.
