PLANT AND ANIMAL CELLS

3. A group of similar cells working together to perform a specific function (e.g., muscle tissue, leaf tissue).
4. A structure made up of different tissues working together to perform a major function (e.g., heart, leaf).
6. The chemical process in the mitochondria that releases energy from food for the cell to use.
9. A rigid outer layer (cell wall) that surrounds plant cells, providing support and structure. Animal cells do not have one.
10. A storage sac within the cell. Plant cells have a large central vacuole for water and nutrients; animal cells have smaller ones.
11. The green organelle found only in plant cells where photosynthesis takes place, containing chlorophyll.
12. A specialised structure within a cell that performs a specific function (e.g., nucleus, mitochondria).
14. An instrument used to magnify and view very small objects, such as cells, which are otherwise invisible to the naked eye.

1. Organelles known as the "powerhouses" of the cell, where energy (ATP) is released during cellular respiration.
2. The thin, flexible barrier (cell membrane) that surrounds all cells, controlling what enters and exits.
5. A tough carbohydrate that makes up the primary component of the rigid cell wall in plant cells.
7. The process in chloroplasts where plant cells use sunlight, water, and carbon dioxide to make food (glucose) and oxygen.
8. A large organelle that acts as the cell's control centre, containing genetic material (DNA).
13. The jelly-like substance inside the cell where organelles are suspended and many chemical reactions occur.
15. The basic, smallest unit of life and building block of all plants and animals.