Across
- 2. the stem like portion of the brain that connects the cerebral hemispheres with the spinal cord and that maintains the necessary functions of the body, such as breathing and circulation
- 4. a microorganism, another organism, a virus, or a protein that causes disease; an infectious agent
- 8. the upper part of the brain that receives sensation and controls movement
- 10. one of the two large muscular chambers that pump blood out of the heart
- 11. a substance prepared from killed or weakened pathogens and introduced into a body to produce immunity
- 12. the gray, outer portion of the cerebrum that controls the higher mental functions, general movement, organ function, perception, and behavioral reactions
- 13. a chamber that receives blood that is returning to the heart
- 14. the long, coiled tube that is on the surface of a testis and in which sperm mature
- 15. a blood vessel that carries blood away from the heart to the body's organs
Down
- 1. in biology, a vessel that carries blood to the heart
- 3. bacteria get used to an antibiotic and no longer respond to it
- 5. certain diseases are caused by the invasion of the body by microorganisms
- 6. portion of the brain that coordinates muscle movement and controls subconscious activities and some balance functions
- 7. a fold of membranes that controls the flow of a fluid
- 9. the group of specialized heart cells that control the heartbeat