Unit 2 Bodies Key Terms

1. the main cell of the nervous system that transfers signals to, from, and within the brain
5. a body system made up of all the muscles of the body that cause movement when they contract, or shorten
6. a typically self-contained structure that carries out a particular function for the body
7. the smallest unit of life; has a distinct shape and function
10. the body system made up of the heart and blood vessels that circulate blood through the body
16. specific kinds of neurons that detect stimuli from outside or inside of the body
17. a thin slice of an organ or tissue made by cutting through it
18. the body system made up of the organs that allow adults to produce offspring
19. the body system made up of the organs that bring oxygen into the body and remove carbon dioxide waste

2. the body system made up of the organs that get rid of waste
3. a bundle of nerve cell axons that transmit information to and from the brain and spinal cord
4. the enlarged appearance of an object when viewed through a microscope
8. a group of structurally similar cells that work together to perform a specific function
9. a change in the internal or external environment that causes the nervous system to react
11. the body system made up of organs that break down food into substances that can be absorbed and used for energy and gets rid of the remaining solid waste that cannot be absorbed
12. a body system made up of the framework of bones that supports an organism’s body, protects its internal structures, and allows the body to move
13. the body system that collects and responds to information from inside and outside of the body; consists of the brain, spinal cord, and a network of nerves
14. an organ of the nervous system that processes information received from both outside and inside of the body
15. an organ of the nervous system that transfers information between the brain and other parts of the body