Human Body

2. Mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use
5. Tubelike passageway at the top of the throat that receives air
8. Groups of similar types of cells that work together to carry out specific tasks
9. Hard outer covering that protects and supports an animal's body
11. Carries blood away from your heart
12. Muscles found only in the heart
16. A tube that is held open by C-shaped rings of cartilage
18. Vessels that carry blood towards the heart
20. Involuntary muscles names for their smooth appearance
25. an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
26. A large muscle below the lungs that contracts and relaxes as air moves into and out of your lungs
27. Tiny vessels that enable oxygen, CO2, and nutrients to move between circulatory system and your entire body
28. Groups of different organs that work together to complete a series of different tasks

1. a transition of a cell from one cell type to another
3. The main organs of the respiratory system
4. Two narrow tubes that lead to the lungs
6. Where blood leaves the heart through two lower chambers of the heart
7. the highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body.
10. A muscular tube that connects the mouth to the stomach
13. Made of strong tissue that can contract in an orderly way
14. Collects and eliminates waste from the body and regulates the level of fluid in the body
15. Where bones are connected to other bones by tissue
17. Where two or more bones meet
19. cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.
21. Parts of food used by the body to grow and survive
22. The many tiny air sacs of the lungs which allow for rapid gaseous exchange
23. Two upper chambers of the heart
24. Groups of different tissues working together to perform a particular task