Biology

3. The system of the heart blood and blood vessels that transports substances throughout the body
5. Any organism or microbe that can cause disease
10. The body's defense system that fights infections and diseases
11. Abnormal growths of cells in the body which can be benign or malignant
12. A group of similar cells working together to perform a specific function in the body
14. Practices that help maintain health and prevent disease like washing hands
16. Bleeding that occurs inside the body often due to injury or disease
18. An organism like a flea or mosquito that transmits a pathogen to a host
20. A single-celled microorganism that can cause diseases like tuberculosis or plague
24. The process by which the body takes in oxygen and releases carbon dioxide
25. Illnesses caused by microorganisms such as bacteria viruses or fungi that can spread between people

1. Diseases caused by microscopic organisms like bacteria viruses or fungi
2. Diseases caused by parasites that live on or inside the human body and feed on its nutrients
4. The complete physical structure of a person including organs tissues and systems
5. Medical practices that focus on preventing diseases rather than treating them
6. The invasion and multiplication of harmful microorganisms in the body
7. A tiny infectious agent that can only reproduce inside living cells
8. The careful cutting apart of organisms to study their internal structures
9. An organism that a parasite or microbe lives in or on to survive
13. A type of organism such as yeast or mold that can cause infections
15. A serious infectious disease caused by the bacterium Yersinia pestis
17. Small structures in the body that filter lymph and help fight infections
19. The system of blood circulation throughout the body that transports cells and nutrients
21. The process of grouping diseases based on their causes symptoms or effects on the body
22. Poor health caused by not getting enough nutrients from food
23. Collections of pus in tissues caused by infection