1. Chapter 2 Fifth Grade Science
Cells to Systems
Chapter 2
Fifth Grade Science

2. Cells and their functions
- _________are the basic building blocks of life.
-basic unit of structure and function in an organisms
- ____________-cannot be seen with the naked eye
-________________Single celled (bacteria)
- _________________Many cells that are specialized to do certain tasks.
Example: muscle and nerve cells perform certain tasks in the body to help us move and feel.
Cells
Microscopic
Unicellular
Multicellular

3. Cell functions Cells must take in __________.
Cells must eliminate ___________.
Cells must use food for __________and ______ of wounds.
Cells sense and _____________ to changes in their surroundings.
Cells work together with other cells for a __________________life function.
food
wastes
growth
repair
respond
specialized

4. Cells Need Energy
Cells get energy through the process of _______________.
Cell Respiration is the taking in of _________ and ____________ in order to get energy.
Cells need energy for:
____________
_____________________
Cell Respiration
food
oxygen
growth
moving
Dividing to make new cells

5. Organelles
_______________are structures that perform specific functions within a cell.
Organelles in an animal cell:
__________-”control center” of the cell, Directs the cells activities, Contains the cells operating instructions, Stores information that will be passed along to new cells.
Organelles
Nucleus

6. Inside the Nucleus __________________-Contain DNA
-carry the instructions for the cell to do its job
-chromosomes control how the whole body grows and changes
-DNA carries genetic information
____________-process of passing genes from one generation to the next
Chromosomes
Heredity

7. Organelles in an animal cell continued
____________- “Powerhouse of the cell” 8convert the chemical energy from food into a form that the cell can use _____________-surrounds the cell and maintains the internal environment of the cell by allowing food to enter and wastes to exit. _____________Contains fluid, Surrounded by a membrane, Store water and nutrients, Help the cell digest food
Mitochondria
Cell Membrane
Vacuole

8. Organelles in an animal cell continued
______________fluid substance containing the organelles. All the material of the cell between the cell membrane and cell wall. - Different kinds of cells have different organelles. Example: Muscle cells have several ________________because muscle cells need a lot of energy for movement. Skin cells have very few mitochondria.
Cytoplasm
Mitochondria

9. Organelles in Plant Cells
______________-rigid wall outside of the cell membrane that provides support (animal cells do not have a cell wall!)
______________-plant cells have one large vacuole. (animal cells have several smaller vacuoles!)
______________-contain chlorophyll which is used for photosynthesis (Animal cells do not have chloroplasts or chlorophyll because they do not make their own food.)
Cell wall
Vacuole
Chloroplast

10. How do cells work together?