Term | Definition |
cell theory | the theory that cells form the fundamental structural and functional units of all living organisms. |
Cell wall | a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. |
cell membrane | the semipermeable membrane surrounding the cytoplasm of a cell. |
cytoplasm | the material or protoplasm within a living cell, excluding the nucleus. |
ribosomes | a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. |
organelle | any of a number of organized or specialized structures within a living cell. |
nucleus | he central and most important part of an object, movement, or group, forming the basis for its activity and growth. |
chloroplast | a plasmid that contains chlorophyll and in which photosynthesis takes place. |
mitochondria | an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. |
endoplasmic reticulum | a network of membranous tubules within the cytoplasm of a eukaryote cell, continuous with the nuclear membrane. |
Golgi body | a complex of vesicles and folded membranes within the cytoplasm of most eukaryote cells, involved in secretion and intracellular transport. |
tissue | any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products. |
organ | a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans. |
organ system | In biology, a biological system is a group of organs that work together to perform a certain task. |
Vacuole | |