| A | B |
|---|
| cells | group together to form tissues |
| nucleus | the "brain" of the cell |
| cell membrane | controls what enters/leaves cell |
| tissues | group together to form organs |
| organs | group together to form systems |
| cytoplasm | thick, gel-like material |
| vacuole | stores water, sugar, waste |
| endoplasmic reticulum | series of transport tunnels |
| mitochondria | produces energy for the cell |
| ribosome | makes proteins |
| unicellular organism | only has one cell |
| multicellular organism | has many cells |
| cell wall | supports & protects plant cell |
| chloroplast | traps light energy from the sun |
| Robert Hooke | first to observe plant cells |
| van Leeuwenhoek | first to observe animal cells |
| Schleiden | all plants are made of cells |
| Schwann | all animals are made of cells |
| Virchow | cells only come from other cells |
| osmosis | water through a cell membrane |
| diffusion | high concentration to low |
| active transport | requires energy |
| passive transport | does not require energy |
| growth | process of getting larger |
| reproduction | process of producing offspring |
| nerve cells | has fine extensions |
| white blood cell | can change its shape |
| red blood cell | disk-shaped, small, flexible |
| muscle cell | has to allow for contraction |
| sperm cell | has a flagellum for locomotion |
