Images from Purves et al., Life: The Science of Biology , 4th Edition . 1) jellyfish breathe through their skin, why can’t we??. Oahu, Hawai’i photo by J Hodin. 2) oxygen passes from the digestive to the circulatory system
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Images from Purves et al., Life: The Science of Biology, 4th Edition
photo by J Hodin
at the alveoli (sacs at the ends of bronchiole passages in the lungs).
Why, for example, does oxygen not just pass into the circulatory
system in the mouth or the throat? Those cells have blood supplies
from: K. Schmidt-Nielsen
Animal Physiology (1997).
This gives them greater capacity to gain oxygen during
women’s Boston Marathon champion
2000, 2001, 2004
4) “blood doping” is an illegal method that some long distance runners
have used to increase their oxygen carrying capacity. How does it work?
(hint #1: it’s similar to high altitude training but without all the hard work)
(hint #2: it’s undetectable)
the diaphragm contracts, air is forced into the lungs. How?
from Purves et al., Life: The Science of Biology, 4th Edition
1 out of 5 deaths in the US are related to smoking
30% of all cancer deaths are attributable to smoking
87% of lung cancer deaths are caused by smoking, and lung cancer
is the leading cause of cancer deaths in men & women
GOOD NEWS ABOUT SMOKING RELATED ILLNESSES:
nicotine is one of the most addictive substances known
(equivalent to heroin and coke, according to the Royal
College of Physicians, London
source: American Cancer Society
types of movement When
(incl. jet propulsion, hydrostatic pressure, spring,
which types of
used by humans
or their cells?
yes!! (e.g. red blood cells)
yes!!(e.g. macrophages: a type of
immune [white blood] cell)
yes!! (e.g. sperm,
body size is important in determining which type a given organism uses