biology crossword

4. a cancerous tumor that does affect surrounding cells and can spread throughout the body.
5. the movement of water molecules across a membrane in response to concentration differences.
6. are thin-walled blood vessels that bring blood towards the heart.
9. transfers the air from your trachea into your lungs.
11. the stage in the cell cycle when the cytoplasm and organelles divide into two identical, separate cells.
12. different tissues working together to perform a specific task.

1. the smallest blood vessel
2. specialized cells working together to perform a function.
3. the process by which nutrients pass from the digestive system to the blood.
7. the stage in the cell cycle when the contents of the nucleus separate into two identical copies.
8. a non-cancerous tumor that does not affect surrounding cells.
10. controls all cell activities.