Body systems

1. Breath in
3. the natural opening through which food passes into the body
5. one of the hard parts of the skeleton of a vertebrate
7. of or relating to sensation or to the senses
10. one of the hard bony appendages that are borne on the jaws
12. the more terminal division of the vertebrate intestine that is wider and shorter than the small intestine
13. the portion of the vertebrate central nervous system enclosed in the skull
15. the terminal part of the leg upon which an individual stands
17. prominence in the center of the face formed of bone and cartilage
18. the cord of nervous tissue that extends from the brain lengthwise along the back in the spinal canal
21. vaulted chamber that lies between the floor of the cranium and the roof of the mouth the natural opening through which food passes
22. at the front of the cavity of the chest, or thorax
23. a human upper limb
25. a muscular tube that conveys food from the mouth to the stomach
28. the narrow part of the intestine that lies between the stomach and colon

2. breath out
4. pertaining to or serving for respiration
6. the skeleton of the head of a vertebrate forming a bony or cartilaginous case
7. a usually rigid supportive or protective structure or framework of an organism
8. something that sustains or fuels
9. the point of contact between elements of an skeleton with the parts that surround and support it
11. a tough cord or band of dense white fibrous connective tissue that unites a muscle
14. any of the paired curved bony or partly cartilaginous rods that stiffen the walls of the body of most vertebrates and protect the viscera
16. an aggregate of cells
19. at the upper part of the trachea
20. the process of making food absorbable by mechanically and enzymatically breaking it down
22. one of the paired vertebrate limbs that in bipeds extend from the top of the thigh to the foot
24. pumplike organ of blood circulation
26. a saclike expansion of the digestive tract of a vertebrate that is located between the esophagus and duodenum
27. any of the filamentous bands of nervous tissue that connect parts of the nervous system with the other organs