Across
- 1. rhythmic stretching of arteries caused by the pressure of force through the vessels during systole
- 4. concentration of nervous system at the head
- 6. division of the autonomic nervous system that controls activities that gain and conserve energy for the body
- 7. nerve cell that transports signals from one part of the body to another
- 9. uses electrodes on the skin to record the activity of the heart
- 12. internal surface is exposed to air, diffusion of O2 and CO2
- 14. breathing system where low air pressure in lungs causes air to enter lungs
- 17. molecules in red blood cells that carry O2 through the blood
- 19. when deep breathing causes large amounts of CO2 to enter blood, which stops the brain from sending signals to the diaphragm
- 25. when air physically taken into the lungs, rib cage expands as rib muscles contract
- 28. part of the cerebrum that connects the left and right hemisphere so they can process information together
- 30. relay point between cells, electrical or chemical
Down
- 2. circuit that carries blood between the heart and rest of body
- 3. self propagating change in the voltage across the plasma membrane
- 5. heart chamber that receives blood
- 8. Hemoglobin binds to this, which interferes with the delivery of O2 in the body cells and cellular respiration
- 10. takes blood from lower body to right atrium
- 11. takes blood from capillaries of the lung to the left atrium
- 13. cardiovascular disease caused by the buildup of cholesterol and other substances in the arteries
- 15. sets tempo of heart beat, SA node
- 16. disease usually caused by smoking, disintegrates alveoli
- 18. the largest amount of air that can be exhaled after a deep breath
- 20. bits of cytoplasm broken off from bone marrow, help with blood clotting
- 21. type of cells that perform the body’s responses
- 22. interprets sensory signals and creates response, in central nervous system
- 23. sheet of muscle that contracts and relaxes during inhalation and exhalation
- 24. clusters of air sacs located at the tips of bronchioles
- 26. system that has multiple relay centers in the forebrain, creates emotions and memories
- 27. contraction phase of the cardiac cycle
- 29. nervous system of the motor division that carries signals to skeletal muscles, voluntary