Across
- 2. division of the nervous system that includes the brain and spinal cord
- 3. connective tissue that transports oxygen, nutrients, and wastes
- 9. digestive and endocrine organ that produces insulin and glucagon
- 12. movement of food through the digestive tract by muscular contractions
- 13. tiny air sacs where gas exchange occurs in the lungs
- 14. type of white blood cell involved in immunity
- 16. tube through which urine exits the body
- 17. functional unit of contraction in a skeletal muscle
Down
- 1. electrical signal transmitted by a neuron
- 4. circuit of the cardiovascular system that transports oxygen-poor blood to the lungs
- 5. feedback mechanism that opposes change and restores balance
- 6. rhythmic contraction and relaxation of the heart
- 7. the functional unit of the kidney where filtration occurs
- 8. the control gland of the endocrine system
- 10. fibrous connective tissue that connects bone to bone
- 11. the ability to maintain a stable internal environment
- 15. blood vessels that carry blood away from the heart