BIO 392 Lecture Notes - Lecture 1: Blood Vessel, Blood Pressure, Baroreflex
Document Summary
> 200 types of specialized cells neurons, connective tissue, epithelial. Tissues- collection of like cells, cellular material of organ. Organs- 2+ kinds of tissue to serve a function. Functional units- small subunits or structures each performing organ function. Organ systems- collection of organs working to perform a function. 20-25% plasma, 75-80% interstitial fluid(outside) interstitium-space containing interstitial fuid. Scaffold for cell attachments, transmits information to cells and other cell systems. Important for regulation of cell activity, migration, growth and differentiation. Composition is very different from extracellular fluid. Skeletal muscle cells attach to bones and aid in movement. Epithelial cells selective secretion and absorption of ions and molecules epithelial tissue. Surfaces that cover the body or individual organs. Rest on extracellular protein layer (basement membrane) Form ecm which is made of proteins, polysaccharides and minerals. Intracellular fluid within cell (67% of all body fluid) How much/how often they change depends on system. Change has to be okay for system"s needs/tolerance.
