| A | B |
|---|
| homeostasis | maintenance of relatively constant internal physical and chemical conditions |
| cell specialization | when the cells of a multicellular organism are designed to play specific roles |
| tissue | a group of similar cells that performs a particular function |
| organ | a group of tissues that work together to perform one or more functions |
| organ system | a group of organs that work together to perform a specific function |
| receptor | a binding spot on the surface of a cell for signaling molecules; helps cells communicate with one another |
| specialized | the cells of multicellular organisms become ________ for particular tasks and communicate with one another to maintain homeostasis_______ |
| grow, respond to the environment, transform energy, and reproduce | to maintain homeostasis, unicellular organisms ___, _____, _____, and _____ |
| tissues, organs, and organ systems | the specialized cells of multicellular organism are organized, from smallest to largest, as________ |
