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Lab 1 the human body
1. The Human Body: Anatomical Regions, Directions, and Body Cavities Lab 1
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10. Levels of Structural Organization Chemical level Atoms combine to form molecules 1 2 3 4 Cellular level Cells are made up of molecules Tissue level Tissues consist of similar types of cells 5 Organ system level Organ systems consist of different organs that work together closely Organ level Organs are made up of different types of tissues 6 Organismal level The human organism is made up of many organ systems Atoms Molecules Smooth muscle cell Smooth muscle tissue Connective tissue Smooth muscle tissue Epithelial tissue Blood vessel (organ) Heart Blood vessels Cardiovascular system Figure 1.1