Across
- 1. state of internal balance achieved by adjusting the physiological systems of the body
- 4. ability to resist pathogens
- 5. the study of the function of the body
- 7. tough bands of fibrous tissue that connect bone to bone
- 9. chemicals secreted by endocrine glands to regulate body functions
- 10. system of acquiring knowledge through observation and experimentation to describe the natural world
- 11. white blood cell that destroys pathogenic microorganisms
- 13. two or more groups of tissues working together to perform specific functions
- 15. an idea or a suggestion often developed to explain something, the cause of which is unknown
- 16. a protein produced by the immune system; circulates in the plasma in response to the presence of foreign antigens
- 20. the "brain" of a cell; directs all activities and contains genetic information
- 21. a stage of life beginning between the ages of 8 and 14; indicates sexual reproduction is possible
Down
- 2. the study of the structure of the body
- 3. groups of cells that work together to accomplish the same task
- 6. cells in the body that evolve into specific cells in a particular organ system
- 8. physical point of connection between two bones; articulation
- 12. process in which white blood cells surround, ingest, and destroy a foreign invader
- 14. fibrous tissues that connect muscles to bone
- 17. any foreign substance, either outside or inside the body, that causes the immune system to produce antibodies
- 18. a method designed to logically formulate, test, and evaluate a problem or hypothesis
- 19. transparent, gel-like substance inside of every cell; cellular activities occur here