Across
- 6. is any self-regulating process by which an organism tends to maintain stability while adjusting to conditions that are best for its survival.
- 8. system is a biological system in animals and plants that consists of specific organs and structures used for gas exchange.
- 9. system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body.
Down
- 1. are a self-contained part of an organism that performs a specific vital function, such as the heart or liver in humans.
- 2. pumping blood through the blood vessels by repeated, rhythmic contractions.
- 3. are a pair of spongy, air-filled organs located on either side of the chest
- 4. gland is a small organ in the front of the neck that wraps around the windpipe.
- 5. system is an organ system consisting of skeletal, smooth and cardiac muscles.
- 7. an organ of soft nervous tissue contained in the skull of vertebrates, functioning as the coordinating center of sensation and intellectual and nervous activity.