Health Sciences 2300A/B Chapter Notes - Chapter 1: Epithelium, Nervous Tissue, Body Cavity
20 Feb 2018
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Chapter 1 an introduction to the human body. 1. 1 anatomy defined: anatomy = the study of structure and the relationships among structures. First studied by dissection: physiology = deals with functions of body parts how they work. 1. 2 levels of body organization and body systems: organized from smallest to largest structure of 6 levels of organization: the chemical, cellular, organ, system, and organismal levels of organization, the chemical level. Atoms, the smallest units of matter that participate in chemical reactions, and molecules, 2 or more atoms joined together. 2 familiar molecules found in the body are deoxyribonucleic acid (dna), the genetic material passed from 1 generation to the next, and glucose (blood sugar: the cellular level. Cells are structures composed of chemicals and are the basic structural and functional units of an organisms. Cells are the smallest living units in the human body: the tissue level.
