1. Levels of Organization Notes
TEKS 7.12C recognize levels of organization in plants and animals, including cells, tissues, organs, organ systems, and organism

2. Cell: Basic unit of structure & function in all living organisms.
Examples:
animals- muscle, bone, nerve, blood, skin, egg, sperm, fat
plants- epidermal, parenchyma, spongy, cambium, xylem, phloem

3. Tissue: Similar cells working together to perform a specific function.
Examples:
animals- muscle, nervous, epithelial, connective
plants- dermal, ground, vascular

4. Organ: Different tissues working together to perform a specific function.
Examples:
animals- brain, stomach, intestines, heart, lungs, liver, etc…
plants- leaves, buds, flowers, fruits, stems, roots, tubers, rhizomes

5. Organ system: Group of different organs working together to perform a particular set of functions.
Examples:
animals- circulatory, respiratory, nervous, digestive, reproductive, muscular, skeletal, etc…
plants- shoot, root

6. Organism: Anything living that is made of cells & needs energy, excretes wastes, grows, responds, reproduces, & uses gases.
Examples: animals, plants, bacteria, fungi, protists, monerans

7. Group of the same species living in a given area.
Population
Group of the same species living in a given area.
Example: the students in this classroom are a population

8. Groups of different populations living in a given area.
Community
Groups of different populations living in a given area.
Example: Your neighborhood (all the people and pets that live around you)

9. All the living and non living things found in a given area.
Ecosystem
All the living and non living things found in a given area.
Example: All the trees, animals, rocks, water, dirt, etc… found in a park.

10. animal organism What level is it?

11. plant cell What level is it?

12. animal system What level is it?

13. animal tissue What level is it?

14. plant organ What level is it?

15. animal organism What level is it?

16. animal cell What level is it?

17. animal tissue What level is it?

18. animal organism What level is it?

19. plant tissue What level is it?

20. animal system What level is it?

21. plant organism What level is it?

22. plant organ What level is it?

23. plant cell What level is it?

24. animal organ What level is it?

25. plant organ What level is it?

26. plant organism What level is it?

27. animal organ What level is it?

28. plant system What level is it?

29. animal organism What level is it?

30. plant tissue What level is it?

31. animal system What level is it?

32. animal organ What level is it?

33. plant organ What level is it?

34. animal organ What level is it?

35. plant organ What level is it?

36. animal cell What level is it?

37. plant system What level is it?

38. plant system What level is it?

39. animal organs What level is it?

40. plant cell What level is it?

41. plant system What level is it?

42. plant organism What level is it?

43. animal tissue What level is it?

44. What level is it?
plant organism

45. animal system What level is it?

46. plant organ What level is it?

47. animal cell What level is it?

48. animal system What level is it?

49. animal organ What level is it?

50. plant tissue What level is it?

51. animal system What level is it?

52. animal organism What level is it?