Hierarchical Organization

2. A group of similar cells corporate to perform a particular function.
4. The organ system which remove waste, e.g. kidneys.
6. The basic structure, ot the smallest particle of life.
9. The organ system which transports materials to and from cells, e.g. heart.
10. The organ system which protects organ, shape our body and allows movement, e.g. bones.
12. A part of the cell which is formed by the macromolecules, provide different functions inside the cell.
14. The organ system which take in and digest food, e.g. intestine.
16. The organ system which allows for movement by contracting, e.g. muscle.
19. The organ system which takes in oxygen and remove another useless substances, e.g. lungs.
20. Molecules produced by organisms, such as lipids, nucleic acid, carbohydrate and protein.
21. Population of different types of organisms living together.
22. The smallest unit where life exist. Made up by various organelles, work as the building block for all organisms.

1. A group where the same species of organism live together in a specific area.
3. The organ system which regulates body activities using hormones, e.g. glands.
5. The organ system which interprets and responds to informations, e.g. brain.
7. A living individual that contains the basis of life(cell) and is able to take different actions.
8. A group where several organs work together to perform certain function within our body.
11. A environment where both living and nonliving organisms exist.
13. Any places where living organisms are inhabit in.
15. A group of chemical bonding atoms.
17. The combination of tissues working together in order to perform a specific function.
18. The organ system which fights off foreign invaders in the body, e.g. white blood cells.