IAHCSMM Chapter 3 - Cells, Tissues, and Organs
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14 terms
Terms | Definitions |
|---|---|
 Cell | The basic unit of life; the smallest structural unit of living organisms capable of performing all basic functions of life. |
| Cell Membrane | The outer covering of a cell that regulates what enters and leaves it. |
| Cytoplasm | The lining matter of a cell between the cell membrane and nucleus. |
| Nucleus | The functional center of a cell that governs activity and heredity. |
| Tissue | A group of similar cells that perform a specialized function. |
| Four major primary tissues | Epithelial tissue, Connective tissue, Muscular tissue, & Nervous tissue. |
| Epithelial tissue | This tissue covers the body's external surface (skin), and the linings of the body cavities. |
| Connective tissue | This tissue provides support, stores energy, and connects other tissue and parts. |
| Muscular tissue | This tissue shortens as it contracts. |
| Nervous tissue | This tissue of communication is located throughout the body. |
| Organ | A part of the body containing two or more tissues that function together for a specific purpose. |
| DNA | deoxyribonucleic acid - stores the information needed to build proteins essential to restore cells, and it transfers messages about organisms from parent to offspring. |
| RNA | ribonucleic acid - translates the DNA messages, and guides the protein-making process. |
| Chromosomes | These cell components are comprised of DNA, and pass on the traits of parents to new cells. |
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