HSB Cells

2. A cell that contracts to cause movement.
6. The male gamete involved in reproduction.
8. Cell A unicellular organism with a nucleus not bounded by a membrane, such as bacteria.
9. Cells that form protective tissue layers, secreting and absorbing substances.
10. A cell that transmits electrical impulses for communication within the body.
11. Organisms that consist of only one cell.

1. Organisms that consist of many cells.
3. The basic unit from which all living organisms are built.
4. Cell A type of cell that has a nucleus bounded by a membrane, like in animals and plants.
5. An instrument used to see very small cells that cannot be seen with the naked eye.
7. Specialized structures within a cell that perform specific functions.
12. The female gamete that provides genetic information and nourishment for the embryo.