posted by Jasine
Choose one of the biological systems described below. What health problems might the giants in the land of Brobdingnag have, or the giant child in the movie Honey, I blew up the Kid?
Transportation system--Your body generates heat according to its volume. But the rate of cooling depends on the area of your skin, since one way to cool down is perspiration. As the water on your skin evaporates, it helps to keep you cool.
Skeletal system--Your mass depends on volume, but the strength of your bones depends on the area of their cross-section.
In the first case the body of larger animals is subject to overheating because the heat generation rate increases faster than the cooling rate as animals become larger. In other words, [(size)^3 increases faster than (size)^2] . "Size" refers to a linear dimension.
In the second case, the probalems oif supporting the body increase with size, because weight increases with volume, (size)^3, while the load-bearing strength of bones increases with (size)^2
Think on the dinosaurs...
They couldn't handle heat...why?
Many of them wallowed in water to support their bodies, why?