science

4. layer of two membranes that surrounds the nucleus of a cell
6. in the nuclear envelope that allow materials to pass in and out of the nucleus
9. a hairlike structure arranged in tightly packed rows that projects from the surface of some cells
11. site of protein synthesis
12. Contain oxidase enzymes that detoxify alcohol, hydrogen peroxide, and other harmful chemicals

1. Cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use
2. A structure in animal cells containing centrioles from which the spindle fibers develop.
3. viscous fluid enclosed by the nuclear envelope
5. One of many fine, finger-like projections of the epithelial cells in the lumen of the small intestine that increase its surface area.
7. Cell organelle that aids in cell division in animal cells only
8. Makes ribosomes
10. Uses chemicals to break down food and worn out cell parts