Biology Vocabulary

2. A network of organs that help you digest and absorb nutrition from your food.
5. A thing or event that evokes a specific functional reaction in an organ or tissue.
7. The development of a plant from a seed or spore after a period of dormancy.
10. A minute, typically one-celled, reproductive unit capable of giving rise to a new individual without sexual fusion, characteristic of lower plants, fungi, and protozoans.
11. The system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands.
13. The network of organs and tissues that help you breathe. It includes your airways, lungs and blood vessels.
14. Composed of specialized cells called muscle fibers. Their predominant function is contractibility.
15. The turning or bending of a plant or other organism in response to a touch stimulus.

1. A tropism (as of plant roots or shoots) in which gravity is the stimulus
3. Your body's outer layer. It consists of your skin, hair, nails and glands.
4. The vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves.
5. Your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments.
6. The orientation of a plant or other organism in response to light, either toward the source of light or away from it.
8. A passive biological system that removes excess, unnecessary materials from the body fluids of an organism.
9. The process of eliminating or expelling waste matter
12. 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.