1. Cells to Systems

2. Cells building blocks of all living things microscopic
need food to grow
must get rid of waste
get energy through cellular respiration

3. Parts of All Cells
Cell Membrane-”skin” that allows materials to enter and exit the cell
Nucleus- “brain” with chromosomes (DNA) that tell the cell what to do
Mitochondria- the “mighty” producers of energy
Vacuoles- “stomach” that stores food
Cytoplasm- material that fills the cell

4. Parts of a Cell

10. Types of Cells Branching Cells Flat Cells Round Cells send signals
example: nerve cells in your brain
Flat Cells
cover a surface
example: skin cells
Round Cells
carry oxygen
shape lets the cells move easily
example: red blood cells

11. Special Cell Structure
Cilia- on the cells in your lungs to sweep dirt and germs out of the airways
“Cilia, your hair is lovely!”

12. And now… …a cool look at these microscopic wonders!
“Oh sweet momma, I can’t wait for this!”

16. Tissue Organ Organ Systems Cells Tissues Organs
group of cells working together to do the same job
examples: muscle tissue, nerve tissue
Organ
group of tissues combined into one structure
examples: heart, stomach, skin
plant examples: leaves, flowers

17. Organ Systems Organ Systems Cells Tissues Organs Organism
group of organs and tissues that work together to carry out a life process
example: mouth, stomach, and intestines work together to digest food
example: muscular system and skeletal system move your body

18. Some Organ Systems in Humans
Muscular System- movement/strength
Skeletal System- support/protection
Respiratory System- breathing
Digestive System- using food
Nervous System- brain function
Circulatory System- moving blood