Biology 2483A Lecture Notes - Lecture 13: Gastrointestinal Tract, Parasitoid, Transferrin

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Hugh Henry

Document Summary

Symbionts organisms that live in or on other organisms (cid:373)ore tha(cid:374) half of earth"s spe(cid:272)ies are symbionts are all not called parasites. Parasite consumes the tissues or bodily fluids of the organism on which it lives (the host) Pathogens are parasites that cause diseases (an abnormal condition affecting the body of the host) Difference between parasites and predators parasites typi(cid:272)ally har(cid:373), (cid:271)ut do(cid:374)"t i(cid:373)(cid:373)ediately kill the organism they eat. Degree of harm varies widely foot fungus vs yersinia pestis (bacterium that causes the plague ) fu(cid:374)gus that (cid:272)auses athlete"s foot is(cid:374)"t lethal, yersi(cid:374)ia is. Parasites typically feed on only one or a few host individuals. Parasitoids insects whose larvae feed on a single host and almost always kill it. Macroparasites large species such as arthropods and worms. Most species are attacked by more than one kind of parasites even parasites have parasites. Many parasites are closely adapted to particular host species explains why there are so many species of parasites.