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Related Flashcards
Cards In This Set
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What are the six levels of organization?
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1.chemical 2.cellular(smallest unit of living) 3.tissue 4.organ 5.organ system(digestive) 6.organism(human)
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Atom
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Smallest unit of matter
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Molecule
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Two or more atoms joined together ex.deoxyribunucleic acid (DNA)
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Tissue Level
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Groups of cells and materials surrounding them.
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4 types of tissues
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Epithelial, connective,muscular,nervous
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Organ level
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Tissues join together into structures that are composed of two or more different tissues. they have specific functions and recognizable shapes.
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System Level
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Consists of related organs with a common function. ex.digestive system, endocrine system.
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What is metabolism?
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Sum all of the chemical processes that occur in the body. catabolism- break down of complex chemical substances. anabolism-building up of complex chemical substances.
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Responsiveness
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Bodys ability to detect and respond to changes. -decrease in body temperature.-responding to sound-nerve and muscle cells contracting
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Movement
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Motion of the whole body
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Growth
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Increase is the bodys size
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Differentiation
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Development of a cell from an unspecialized to a specialized state.-cells have specialized structures and functions that different from precursor.-stem cells-gives rise to cells that undergo differentiation
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Reproduction
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Formation of new cells(growth,repair or replacement)production of new individual cells.
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Homeostasis
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A condition of equilibrium in the body's internal environment.-narrow range is compatible with maintaining life.ex. humans pH 7.35-.45
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How does homeostasis affect body fluids?
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Maintaining the volume and composition of the body fluids. very important.
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