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BIOD27H3 (42)
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Chapter 1

Chapter 1

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University of Toronto Scarborough
Biological Sciences

-Physiology: study of normal functioning in living organisms PHYSIOLOGICAL SYSTEMS -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 -Organs: collection of tissues -Organ systems: group of organs with integrated function ORGAN SYSTEM -Integumentary system: composes the skin; forms protective boundary separating internal environment from external environment -Musculoskeletal system: provides support and body movement *4 systems that exchange materials between internal and external environment: -Respiratory system: exchanges gas -Digestive system: takes up nutrients & water and eliminates wastes -Urinary system: removes excess water and waste materials -Reproductive system: produces egg or sperm *4 systems that extend throughout the body: -Circulatory system: distributes material by pumping blood through vessels -Nervous systemendocrine system: coordinate body function -Immune system: immune cells positioned to intercept materials that may enter through exchange surfaces or break in skin; protect internal environment from foreign invaders. Closely related to circulatory system. *refer to pg 4 table 1.1 for details FUNCTION AND PROCESSES Q: Why do red blood cells transport oxygen? -Teleological approach (function of physiological system or event) www.notesolution.com
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