Across
- 2. 11 major organ systems in the human organism
- 4. a biological system that removes excess materials from the body fluids of an organism
- 5. composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts
- 7. vessels of the circulatory system that support circulation by conveying blood to the heart
- 8. a biological system used for gas exchange in animals and plants
- 9. a chemical messenger system comprising feedback loops of the hormones that regulate distant target organs
- 11. the smallest and most numerous of the blood vessels
- 13. a system that circulates blood throughout the body
- 15. the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body
- 17. this system gives the body its shape, allows movement, and provides protection for organs
- 18. involves breaking down the food into simpler nutrients that can be used by the cells
- 19. required for the correct development of animals, plants and fungi
Down
- 1. consist of a single muscle cell
- 3. a highly complex part of a body that uses sensory information by transmitting signals to and from different parts of its body
- 5. a system that permits movement of the body and maintains posture
- 6. digestion is the breakdown of food into smaller and smaller components so that they can be absorbed into the body
- 10. the biological system made up of all the anatomical organs involved in sexual reproduction
- 12. an organ which produces and releases substances that perform a specific function in the body
- 14. involves physically breaking the food into smaller pieces
- 16. a complex network of cells and proteins that defends the body against infection