activity 2: supply the blank with the correct word/words.
_______1. They make up tissues.
_______2. They make up an organ.
_______3. They make up a system.
_______4. A system which connects all your body parts and transmits signals from one part to another.
_______5. A system of cells, tissues, and organs that regulates the body responses to internal stimuli.
_______10. An organ which is the distributor of information for the body
_______11. It serves as the channel for signals between the brain and the rest of the body.​