Biology Crossword

3. The movement of molecules frim an area of high concentration to an area of low concentration until they are evenly distributed.
4. Air sacs in the lungs where gas exchange occurs/
5. system Provides a frame work for the muscles to attach. It protects soft organs and it stores minerals such as calcium.
8. The stage in the cell cycle when the cytoplasm and organelles divided into two identical, seperate cells.
10. Different tissues working together to perform a certain task.
11. The second phase of mitosis when the chromosomes align in the center of the cell.
12. The number of molecules of a substance given volume.
13. The fourth phase of mitosis when the membrane surrounding the nucleus re-forms, creating two new nuclei.

1. The smallest blood vessel.
2. system Gathers and interprets sensory information from outside and inside the body. It cordinates all the functions of the organ system.
6. Specialized cells working together to perform a function.
7. Produce urine by filtering wastes and excess water from the blood.
9. stage in the cell cycle when the cell grows and carries out its usual functions, as well as making a copy of it's DNA and organelles to prepare for cell division.
12. wall A tough, rigid structure lying just outside of plants cell's membrane. Provides support for the celL.(Not found in animal cells).