BIOL273 Chapter 1: Chapter 1 textbook material only All material not covered in the lecture notes.
16 Oct 2011
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Anatomy: study of structure, with less emphasis on function. Musculoskeletal system: provides support and body movement. Four systems extend throughout the body: circulatory system distributes materials by pumping through blood vessels, nervous system coordinate body functions, endocrine system coordinate body functions. Immune system cells positioned to intercept material that may enter through the exchange surfaces or a break in the skin. Organisms that survive challenging habitats cope with external variability by keeping their internal environment relatively stable homeostasis. Ecf: watery internal environment of multicellular animals: buffer between cells and outside world, when ecf state changes things come into play to change it back processes have evolved to do this. Ex. removing water so cells do not dilute. Claude bernard: la fixite du milieu interieur: consistency of the internal environment. Cannon: created word homeostasis (homeo = similar; stasis = condition: body maintains normal state and takes action to correct disruptions that threaten normal functions.
