Year 8 Cell and Organisation - Revision 2014

Name: ______Form: ______Words: function, respiratory, multicellular, cells, level, circulatory, tissues, nervous system 1. The Human Body is very complex. The Human Body, as a ______organism, is composed of several ______of organization that include cells, tissues, organs and organ systems. 2. Each smaller level combines together to make the next level. 3. ______are the building blocks of all living things. 4. A tissue is a group of similar cells that perform the same ______. 5. Organs are groups of different ______with a specific function. 6. Finally, organ systems are groups of organs that work together to perform a specific job. Give 3 systems in our body: ______, ______and ______systems. 7. The Human Body is made up of many systems that work together to perform complex tasks on a daily basis.

8. Arrange the 6 different levels of organisation of human body: tissue, cell, organ, organism, organelle, organ system

9. Match the following organelles with their role in a cell. Choice Function The correct structure: Cell Wall Stores water in plants

Cell Membrane Jelly-like substance where chemical reactions happen

Cytoplasm Structures found in living cells Nucleus Gives energy to a cell

Vacuole A skin that lets substances into and out of a cell

Mitochondria Barrier of a plant cell

Chloroplasts Control centre of cell, where cell division starts (mitosis)

Organelles Makes own food using Photosynthesis

10. Why are cells important? (Check the Internet for answers if needed) 11. Label the following diagrams: chloroplast, cytoplasm, cell wall, vacuole, nucleus, cell membrane.

12. Give three differences between an animal cell and a plant cell.

13. What is the difference between a unicellular and multicellular organism?

14. Label the parts: eyepiece, objective, stage, diaphragm, arm, nosepiece, base, stage, fine adjustment, coarse adjustment, body tube, stage clip, mirror 15. What do the following parts of a microscope do?  Stage -  Diaphragm-  Objective Lenses-  Mirror-

16. When you see an image under a microscope what happens to the image: a. It stays the same b. It becomes a mirror image c. It looks upside down and left to right d. It just flip downward

17. Fill in the magnification of a microscope: eyepiece Objective lens magnification X 10 X 10 X 10 X 5 X 10 X 80

18. Give 2 differences between Light Microscope and Dissecting Microscope.

19. What are the steps to preparing an onion cell?

20. Our body is made up of many specialised cells, what do the following cells do in our body:  Red blood cell  Fat cells  Nerve cells  Muscle cells

21. Which is the only cell in our body that doesn’t have a nucleus?

22. What is a tissue? Give 3 examples.

23. Why are tendons and ligaments in our body called connective tissue?

24. What is an organ made up of? a. The building block of all living things b. At least two different types of tissues c. Two or more different organs that work together d. A group of cells that do the same thing in the body

25. What is mitosis?

26. What structure/chemical makes the mitosis possible?

27. Arrange different stages of mitosis in the correct sequence.