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Across 5. The part of the brain that controls the ability to think, learn, and talk 10. A tough, flexible connecting tissue that attaches one bone to another bone at a joint 11. Bones that form the backbone 12. A sac attached to the liver, in which extra bile is stored until needed 14. A place in the body where bones come together and movement can occur 16. Any bone in the fingers or toes 18. A basin-shaped structure in the skeleton 21. An involuntary response not controlled by the brain 22. A hard structure that supports and protects and animal or human’s body 23. The long bone of the upper arm that extends from shoulder to elbow 24. The main part of the system of tubes by which air passes to and from the lungs to make breathing possible 30. The outer and usually smaller of the two bones of the hind limb below the knee 31. The upper portion of the windpipe that contain the vocal cords – voice box

Down 1. The part of the brain that smoothes and coordinates movement 2. One of the pair od organs for breathing found in the chest. The lings take in oxygen from the air and remove carbon dioxide from the blood 3. Blood vessels that join the end of an artery to the beginning of a vein 4. The smallest unit of an organism that carries out all activities of life 6. The passage for food from the mouth to travel to the stomach 7. The muscular organ inside the chest that pumps blood through the body 8. Either of the two lower chambers of the heart that receive blood from the auricles and forces it into the arteries 9. The red liquid that flows throughout the bodies of humans 13. Any of the blood vessels that carry blood away from the heart to all parts of the body 15. The small bones in the foot between the metatarsus and the leg – ankle 16. A gland near the stomach that helps digestion 17. A large reddish-brown organ in people and animals that helps the body absorb food 19. Different cells working together to do the same job 20. The large organ like a bag or pouch into which food passes from the mouth and throat to begin the process of digestion 25. The bone on the thumb side of the forearm 26. The chambers of the heart that receives the blood from the veins 27. To breathe air into the lungs 28. The long bone of the leg extending from the hip to the knee and supporting the thigh 29. One of the blood vessels through which the blood flows to the heart from all parts of the body