Knowledge Acquisition Activity

3. System which eliminates waste products from the body.
5. A group of cells that perform a single function.
6. A type of tissue that provides support for the body and connects its parts.
9. System which transports oxygen, nutrients, and hormones to cells; fights infection.
12. System which guards against infection and injury and ultraviolet radiation from the sun; helps to the body temperature.
16. Molecules absorbed into the blood and carried to cells throughout the body.
18. Describes the constant internal physical and chemical conditions that organisms maintain despite changes in internal and external environment.
19. Is the amount of heat needed to raise the temperature of 1 gram of water by 1 degree Celsius.
21. System which brings in oxygen needed for cellular respiration and removes excess carbon dioxide from the body.
23. System which controls growth, development, and metabolism.

1. System which supports the body; protects internal organs.
2. System which helps protect the body from disease; collects fluid lost from blood vessels and returns it to the circulatory system.
4. System which produces gametes; in females, nurtures and protects developing embryo.
7. Polymers of amino acids.
8. The most important nutrient.
10. System which breaks down food; Absorbs nutrients.
11. Are a major source of energy for the body.
13. The tissue that lines the interior and exterior body surfaces is called.
14. Tissue by which movements of the body are possible.
15. System which recognizes and coordinates the body´s response to changes in its internal and external environments.
17. Help the body absorb fat-soluble vitamins and are a part of cell membranes, nerve cells, and certain hormones.
20. A group of different types of tissues that work together to perform a single function or several related functions is called.
22. Is technically part of the digestive system because it produces bile, which aids in the digestion of fats.
24. Basic unit of structure and function in living things.