Cells Crossword

4. The process in which a unicellular organism transfers some of its genetic material to another unicellular organism
7. A body tissue that contracts, making body parts move
9. A body tissue that covers the surfaces of the body, inside and out
11. A disease in which some body cells divide uncontrollably
13. The control center of a cell that directs the cell's activities
14. A group of similar cells that perform the same function
15. The basic unit of structure and function in a living thing

1. A group of organs that work together to perform major functions in the body
2. A body tissue that provides support for the body and connects all of its body parts
3. Single-celled organisms that lack a nucleus
5. A structure in the body that is composed of different kinds of tissue
6. A blood cell that fights disease
8. A cell in the blood that takes up oxygen in the lungs and delivers it to cells elsewhere in the body
10. A tiny, nonliving particle that invades and then reproduces inside a living cell
12. A cell that carries information through the nervous system