Across
- 5. the vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem.
- 8. blood vessels in humans
- 9. the process of a cell changing from one cell type to another
- 11. the involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wave-like movements that push the contents of the canal forward
- 12. the division of the nervous system containing all the nerves that lie outside of the central nervous system
- 13. a cell or group of cells that receives stimuli
- 16. a pair of spongy, air-filled organs located on either side of the chest
- 18. a group of cells that have similar structure
- 19. of the heart that pumps blood into the vessels to reach the tissues and organs
- 20. blood vessels in humans
- 21. he external skeleton that supports and protects an animal's body
- 22. any of the muscular-walled tubes forming part of the circulation system by which blood (mainly that which has been oxygenated) is conveyed from the heart to all parts of the body.
- 24. an electrically excitable cell
- 26. a thin skeletal muscle that sits at the base of the chest
- 28. a short band of tough, flexible fibrous connective tissue which connects two bones or cartilages or holds together a joint
- 30. the muscular tube that carries food and liquids from your mouth to the stomach
- 34. the point of contact between elements
- 35. purely physical process
- 36. the system of an organism's body that performs the function of excretion,
- 37. a hollow part or cavity in an organ
- 38. windpipe
- 41. the vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves
- 42. he processing center of the body
- 43. a substance that provides nourishment essential for growth and the maintenance of life
- 44. the blood is not enclosed in the blood vessels
Down
- 1. any of the finger like or threadlike projections from the surface of certain membranous structures, typically serving to increase surface area and facilitate the passage of fluid or nutrients
- 2. any of the major air passages of the lungs which diverge from the windpipe
- 3. of the xylem and the phloem
- 4. any of the many tiny air sacs of the lungs which allow for rapid gaseous exchange.
- 6. contractile tissue grouped into coordinated systems
- 7. system a biological system consisting of a group of organs that work together to perform one or more functions
- 10. the major controlling, regulatory, and communicating system in the body
- 14. a part of the nervous system responsible for processing sensory information
- 15. skeleton a skeleton formed by a fluid-filled compartment within the body
- 17. involuntary muscle
- 23. the secretions of enzymes throughout your digestive tract.
- 25. the passageway leading from the mouth and nose to the esophagus and larynx
- 27. involuntary striated muscle tissue found only in the heart
- 29. each of the two upper cavities of the heart from which blood is passed to the ventricles. The right atrium receives deoxygenated blood from the veins of the body; the left atrium receives oxygenated blood from the pulmonary vein.
- 31. minute openings found in the epidermis of leaves, stems and other plant organs
- 32. long, thin, tubular structure made up of nervous tissue
- 33. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
- 39. the energy needed to raise the temperature of 1 gram of water through 1 °C
- 40. the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body
- 44. a group of tissues with similar functions