BIOD27H3 Chapter 1: Chapter 1
Document Summary
Physiology: study of normal functioning in living organisms. Cell: smallest unit of structure capable of carrying out all life processes; collection of molecules separated from external environment by barrier called cell membrane. Tissues: collection of cells that carry out related function. Organ systems: group of organs with integrated function. Integumentary system: composes the skin; forms protective boundary separating internal environment from external environment. *4 systems that exchange materials between internal and external environment: Digestive system: takes up nutrients & water and eliminates wastes. Urinary system: removes excess water and waste materials. Circulatory system: distributes material by pumping blood through vessels. I mmune system: immune cells positioned to intercept materials that may enter through exchange surfaces or break in skin; protect internal environment from foreign invaders. *refer to pg 4 table 1. 1 for details. Teleological approach (function of physiological system or event) www. notesolution. com. a: because cells need oxygen and red blood cells brings it to them.
