Across
- 2. upper chamber of the heart
- 6. the sides of the DNA helix are made up of sugars and ____________.
- 8. a whip-like tail on a bacterium for movement
- 9. the myelin sheath covers this part of the neuron
- 10. rod shaped bacteria
- 12. pumping chamber of the heart
- 13. RNA contains this base but DNA does not
- 14. a nonliving particle that invades cells and causes disease
- 15. space between neurons where neurotransmitter chemicals are found
Down
- 1. part of the neuron that receives the signals
- 3. tiny blood vessel through which oxygen and nutrients can pass
- 4. made of a sugar, phosphate, and a nitrogenous base
- 5. made in your mouth; part of the first line of defense in the immune system
- 7. the amount of cytosine in DNA equals the amount of __________.
- 10. made by the liver to help break down fats
- 11. DNA contains the code for making these molecules
- 12. injection of pieces of a virus to prevent you from getting the disease