Human Body Systems

4. an enzyme stored in the gallbladder
7. blood vessels with more muscular walls due to increased pressure of pumping heart.
9. nerves carry messages in the form of ________ signals.
12. a hormone made by the pancreas to monitor blood glucose levels.
13. the long part of the neuron that the impulse travels through
14. the part of the neuron that receives information
15. the endocrine and nervous systems help maintain this
16. interprets messages and sends commands.
17. nutrient necessary for maintaining and building muscle mass along with helping recover from training.

1. system plays a part by supplying the oxygen used in cellular respiration.
2. system with the important function of absorbing nutrients
3. system that delivers nutrients to cells around the body through the bloodstream.
5. oxygen passes from the blood to the organs through the walls of?
6. made up of many nerve cells
8. an electrical signal is changed to a chemical signal to cross this
10. an organ in the respiratory system
11. nutrient that provides quick energy