| A | B |
|---|
| cell | The basic unit of structure and function of living things |
| organelle | The structures that make-up a cell. |
| cell theory | All living things are made of cells;cells are the basic unit of structure and function of living things;living cells come from only other living cells |
| cell wall | outermost boundary of plant cells, made of cellulose |
| nucleus | cell structure that directs all of the activities of the cell |
| nuclear membrane | structure that surrounds the nucleus, allowing only certain materials to enter and leave. |
| chromosome | thick, rodlike structures that directs the activites of a cell and passes on the traits of a cell to new cells |
| nucleolus | believed to be the site of ribosome production |
| cytoplasm | region between the cell membrane and the nucleus |
| endoplasmic reticulum | tubular passageways in the cell through which substances such as proteins are transported |
| cell membrane | thin, flexible envelope that surrounds a cell and allows passage of materials into and out of the cell |
| ribosome | protein-making site of the cell |
| mitochondria | powerhouses of the cell in which cellular respiration occurs |
| vacuole | large, round sac in the cytoplasm of a cell that stores water, food, enzymes, and other materials |
| lysosome | small, round structure in a cell involved in the digestive activities of the cell |
| chloroplast | cell organelle contianing chlorophyll that is involved in the process of photosynthesis, found only in plant cells |
| division of labor | division of work among the different parts of an organism's body that keeps an organism alive; each part has a specific job |
| tissue | group of similar cells that perform a special function in an organism; the second level of organization in an organism |
| organ | group of different tissues working together; the third level of organizaion in an organism |
| organ system | group of organsthat work together to perform a specific function for the organism; the fourth level of organization in an organism |
| Robert Hooke | Discovered the first cells, they were dead plant cells from a cork |
| Anton van Leeuwenhoek | First to see "animalicules" |
| Matthias Schlieden | Discovered that plant parts are made ofcells |
| Theodor Schwann | Discovered that animal parts are made of cells |
| Rudolph Virchow | Stated that living cells come only from other living cells. |
| eyepiece | used to view the specimen |
| coarse focusing knob | used to bring the specimen into view |
| fine focusing knob | used to sharpen the image |
| arm | used to carry the microscope and hold up the eyepiece |
| stage | used to hold up the slide |
| stage clips | keeps the slide in place |
| revolving nosepiece | used to switch the objective lenses |
| objective lenses | has three magnifications to view the specimen |
| diaphragm | allows different amounts of light to go through the hole in the stage |
| Outer covering of an animal cell | cell membrane |
| Nucleic Acids | DNA and RNA |
| First level of organization | cells |
| Second level of organization | tissues |
| Third level of organization | organs |
| Fourth level of organization | organ system |
| Fifth level of organization | organism |
