| A | B |
|---|
| nutrition | digestive system--take in food, breakdown food molecules, remove undigested food |
| Reproduction | production of new cells or organisms |
| transport | circulatory system--circulation of materials within an organism |
| Excretory system | removes cellular and liquid wastes and carbon dioxide and oxygen |
| Respiration | oxygen into the body; eliminate carbon dioxide; release of energy |
| regulation | nervous and hormonal control of all life functions |
| synthesis | an organism builds larger molecules from smaller ones |
| growth | increase in cell size or number of cells in an organism |
| metabolism | the total of all the life activities required to sustain life |
| biosphere | the part of the earth's atmosphere, soil, water where living organisms can exist (ex: earth) |
| ecosystem | the interacting system of a biological community and their non-living surroundings or air, water, soil and rocks (fish and seaweed in the ocean) |
| Homeostasis | organisms internal environment is kept stable in spite of changes in the environment |
| photosynthesis | green plants make their own food |
| diffusion | absorbtion of materials into an organism |
| community | a natural interacting population of plants and animals in a common location |
| population | the total NUMBER of living things of the same species living in a certain area |
| organism | any living thing that carries on the activities of life |
| organ system | a group of organs that work together performing the same general function |
| Examples of organ systems | digestive, respiratory, circulatory |
| organ | plant or animal parts made up of different tissues that perform the same body system |
| tissue | a group of the same type of cells that perform a specialized function |
| Examples of tissue | nervous, blood, muscle, skin) |
| cell | the smallest structure and function of all living things that can live on its own |
| About how many cells in the adult human body? | 20 trillion |
| organelle | small part of a cell that performs a specific function |
| Examples of organelles | nucleus, mitochondria, vacuole, cell membrane |
| molecule | two or more atoms that are chemically combined to form living and non-living things |
| atom | the smallest part of an individual element |
