Across
- 2. A structure made of different tissues that performs a specific job
- 4. An organ that releases chemicals called hormones
- 8. A process where the body regulates itself
- 11. Liquid produced in the mouth to help break down food
- 13. Muscle contractions that move food through the digestive system
- 15. Carries blood away from the heart
- 17. A bundle of nerves that carries messages
- 18. A chemical messenger made by a gland
- 22. Arranged in a specific order
- 24. Tiny blood vessels that connect arteries and veins
- 26. Getting rid of waste products
- 27. Refers to a balanced state
- 28. To become shorter or tighter
- 29. A group of similar cells working together
- 30. A protein that speeds up a chemical reaction
- 31. The control center of the nervous system
- 32. Fluid that travels through the lymphatic system
- 33. Carries blood back to the heart
- 36. The way an organism reacts to a stimulus
Down
- 1. Air passages in the lungs
- 3. An automatic response to a stimulus
- 5. Tiny air sacs in the lungs where gas exchange happens
- 6. The junction between two neurons
- 7. The process of breaking down food into usable parts
- 9. The passing of digested nutrients into the bloodstream
- 10. A nerve cell
- 12. Something that causes a reaction
- 14. A system that carries blood throughout the body
- 16. Substances needed by an organism to survive and grow
- 19. Group of organs working together for a specific function
- 20. The feeling of being overwhelmed or under pressure
- 21. An organ that releases chemicals called hormones
- 23. The process of removing waste products from the body
- 24. Sugars and starches, a type of nutrient
- 25. How different parts of an organism work together
- 34. A signal that travels through a nerve cell
- 35. Tiny structures in the kidneys that filter waste