| A | B |
|---|
| muscular system | the body system that allows internal and external body parts to move |
| pulse | the heartbeat as felt through the walls of the blood vessels |
| chloroplast | a part of a plant that contains chlorophyll |
| chlorophyll | a material in green plants that can turn water, air, sunlight into food |
| oxygen | the invisible odorless gas that makes up part of the air humans breathe |
| vaccine | a medicine made of weak or dead microbes that teach the body to fight stronger microbes |
| muscle | tissue that produce movement |
| artery | a blood vessel that moves oxygen-rich blood from the heart |
| organ | a part of an organism made of different kinds of tissue |
| unicellular | composed of only one cell |
| nucleus | the cell part that controls a cell's acvtivities |
| photosynthesis | the process that plants use to make food |
| vein | a blood vessel that carries blood back to the heart |
| tissue | a group of cells in an organism that is similar in form and function |
| cell | the smallest unit in an organism |
| plasma | the liquid part of blood |
| antibodies | a collection of cellsand organs in the human body that protect against disease |
