vocabulary word | definition |
Cell theory | a scientific theory that describes the properties of cells |
Cell wall | strong, supporting layer around the cell membrane in plant cells |
cell membrane | thin, flexible barrier around all cells; regulates what enters and leaves the cell |
cytoplasm | fluid portion of the cell outside of the nucleus |
ribosome | Cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis |
organelle | a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans |
nucleus | in cells, a structure that contains the cell's genetic material in the form of DNA |
chloropast | organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy |
mithochondrion | cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use |
endoplasmic reticulum | internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled |
golgi body | organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell |
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 | a group of organs that work together to perform a certain task |