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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



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2) oxygen passes from the digestive to the circulatory system

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

nearby too!

from: K. Schmidt-Nielsen

Animal Physiology (1997).


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3) long distance runners often train at high altitudes. system

This gives them greater capacity to gain oxygen during

exercise. How?

Catherine Ndereba

women’s Boston Marathon champion

2000, 2001, 2004

http://kenyapage.net/sports/kenya-track.html


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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)

PhysioRoom.com


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5) breathing is a muscular process involving the diaphragm. When

the diaphragm contracts, air is forced into the lungs. How?

from Purves et al., Life: The Science of Biology, 4th Edition


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BAD NEWS ABOUT SMOKING-RELATED ILLNESSES: When

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:

they’re preventable!!

nicotine is one of the most addictive substances known

(equivalent to heroin and coke, according to the Royal

College of Physicians, London

BUT....

source: American Cancer Society


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types of movement When

http://192.107.108.56/portfolios/b/bess_n/bessthesisproject/pictureglossary.htm

passive

ameboid

cilia/flagella

muscular contraction

(incl. jet propulsion, hydrostatic pressure, spring,

hydraulic pressure...)

chemical explosion!

buoyancy

which types of

movements are

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,

air passages...)

yes!!

no

no

body size is important in determining which type a given organism uses


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