Across
- 2. a protein that converts chemical energy to mechanical energy
- 4. short branched extension of a nerve cell
- 6. sheath, greatly extended and modified plasma membrane
- 8. long thread-like part of a nerve cell
- 11. the most abundant protein in eukaryotic cells
- 12. external layer of covering ie. skin
- 14. basic rod-like organelle of a muscle cell
- 15. part of an organism that is typically self-contained with its own function
Down
- 1. a bundle of fibers connecting nerve centers
- 3. the basic contractile unit of a muscle cell
- 5. secret hormones directly into the blood
- 7. tissue that forms the outer layer of a body's surface
- 9. a subcellular structure that has one or more specific jobs to perform within the cell
- 10. an organism with cells in which the genetic material is DNA in the form of chromosomes
- 13. single-celled organism that does not have a distinct nucleus or any specialized organelles