Science Vocabulary 6-1 Body Systems

6. a system that transports materials through blood using vessels.
7. the main organs of the respiratory system.
10. two narrow tubes that carry air into the lungs from the trachea.
13. a large muscle below the lungs that contracts and relaxes as air moves into and out of your lungs.
14. the mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use.
16. the part of your nervous system that detects or senses the environment.
17. muscle found only in the heart.
19. a group of similar types of cells that work together to carry out specific tasks.
21. a tubelike passageway at the top of the throat that receives air, food, and liquids from the mouth or nose.

1. a muscular tube that connects the mouth to the stomach.
2. waves of muscle contractions that move food through the digestive tract.
3. a part of food used by the body to grow and survive.
4. a vessel that carries blood toward the heart.
5. a fluid-filled internal cavity surrounded by muscle tissue.
8. the part of an organism that gathers, processes, and responds to information.
9. a type of vascular tissue that carries dissolved sugars throughout a plant.
11. a group of different tissues working together to perform a particular job.
12. the tissue that connects bones to other bones.
15. special structures in all parts of the sensory system that detect stimuli.
16. a small opening in the epidermis, or surface layer, of a leaf.
18. the upper two chambers of the heart.
20. a type of vascular tissue that carries water and dissolved nutrients from the roots to the stem and the leaves.