A species with no living members is extinct. Examples include dinosaurs, dodos, wooly mammoths, etc.
This has to do with blood pressure, blood leaving the right ventricle only has to travel through the pulmonary vessels and the lungs before returning to the heart.Therefore the r vent, does not pump it very hard, this creates a lower pressure, therefore the pulmonary vessels do not need to be as thick. However, the blood entering the aorta vent needs to travel a great distance throughout the body), it is pumped very hard in order for the blood to circulate. Thus the walls of the aorta need to be thicker in order to withstand the higher pressure.
that's interesting!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Well,
As we know, protein is a body building food. So you need proteins to build up muscle bulk. Therefore the answer is A) Eat a healthy, balanced diet and follow a regular fitness program. And choice D) would also be accurate. So I would say A & D.
As in our society, becoming old is portrayed as the worst part of life. There's ads of makeup to reduce fine lines, plastic surgery to appear more youthfull and a saying, "Ladies never reveal their age." Aging is apart of life, it's inevitable. But it's something people don't like to talk about, yet reveal it. So, I think the stigma about old people comes from the fear of aging. So, people tend to think of the elderly as gross and useless. Which is absurd to degrate a class of people just because of age. Although, I most of this mentality comes from mostly teenagers. Problobly arising from the age differences the two generations have between them.
Hope this helped.
