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Organization&Systems
Doerre Biology 2018-2019 Biological Processes, Systems, and Organization.
Term | Definition |
---|---|
Atom | Smallest non-living unit of all things. Lowest on the levels of organization |
(Bio)Molecule | A substance made up of several atoms. Biomolecules are made up of at least one carbon atom in addition to other atoms. |
Organelle | Structures in cells that have specific functions. Made of several molecules. |
Cell | Smallest living unit of all living things. Basic unit of structure and function. Contains several organelles. |
Tissue | A group of cells that work together to perform a specific function. |
Organ | A group of tissues that work together to perform a specific function. |
Organ System | A group of organs that work together to perform similar functions. |
Organism | A living thing. Has many organ systems. |
Population | A group of organisms of the same species in one area. |
Community | All the populations in an area. |
Ecosystem | All the living and nonliving things in an area. |
Biome | Ecosystems with the same climate and dominant plant communities. |
Biosphere | The area of Earth in which all organisms reside. |
Epithelial Tissue | The tissue that lines the interior and exterior of the body. |
Connective Tissue | Includes fat cells, bone cells, and blood cells. |
Nervous Tissue | Can be found in the brain, spinal cord, and nerves. |
Muscle Tissue | Helps perform voluntary and involuntary movements. Found in many organs. |
Nervous System | Recognizes and coordinates the body's response to changes. |
Integumentary System | Guards against ultraviolet light. |
Immune/Lymphatic System | Protects the body from disease. |
Muscular System | Produces voluntary and involuntary movement. |
Circulatory System | Transports oxygen to cells. |
Skeletal System | Protects internal organs. |
Respiratory System | Brings in oxygen for cellular respiration. |
Digestive System | Breaks down food. |
Excretory System | Eliminates waste products from the body. |
Endocrine System | Controls growth and metabolism. |
Reproductive System | Produces gametes. |
Homeostasis | A relatively constant internal, physical, and chemical condition that organisms maintain. |
Feedback Inhibition/Negative Feedback | Process in which a stimulus produces a response that opposes the original stimulus. |