Across
- 3. Breaks down food by churning with enzymes
- 14. Passes air to the lungs
- 17. Absorbs nutrients from food and passes them to the bloodstream
- 18. See-through eyelid that protects and moistens the eye
- 20. Nostrils; used for both smelling and breathing
- 22. Thin and moist; amphibians breathe through their skin
- 23. Passes whole prey to the stomach
- 25. Filter blood to remove waste, producing urine
- 26. Creates digestive enzymes, such as bile which breaks down fatty foods
- 27. Receives oxygenated blood from the lungs and pumps it to the ventricle
- 28. Produce eggs
- 29. Many smaller teeth that line the rim of the jaw
- 31. A clear membrane that holds the small intestine in place
- 33. Muscular; pumps blood out of the heart to the body or lungs
Down
- 1. Eardrums that pass sound to the inner ear
- 2. Pair of teeth on the roof of the mouth
- 4. Stores urine until it is time to pee
- 5. Energy reserves to survive during hibernation
- 6. Coat eggs in a protective gel, preventing the eggs from drying out and helping them to float
- 7. Produce mucus to moisten the skin
- 8. Help males grip the females tightly during amplexus
- 9. Stores extra bile
- 10. Produce sperm
- 11. Site of respiration in addition to the skin, adding oxygen to the blood and removing carbon dioxide
- 12. Captures prey
- 13. Common exit for the digestive, excretory, and reproductive systems
- 15. Absorbs water from waste
- 16. Receives deoxygenated blood from the body and pumps it to the ventricle
- 19. Equalize pressure in the inner ear while a frog swims
- 21. Produces digestive enzymes and hormones
- 24. Carry urine from the kidneys to the urinary bladder
- 30. A muscle that pumps blood through the blood vessels
- 32. Recycles dead red blood cells