Unit 3 | Human Body Systems

The cell is the basic building block of

• complex organisms
• a building
• a house
• complex matter

Which terms should be in 2 and 4?
1. Cells          
2. ___________
3. organs      
4. ___________
5. organism 

• 2 = tissues 
  4 = organ system
• 2 = animal cell
  4 = plant cell
• 2 = organ systems
  4 = tissues
• 2 = organ system
  4 = organism 

Why do cells have different shapes?

• Because they have different functions.
• Because they have different names.
• Because they live in different areas.
• Because they live happily ever after.

A group of tissues make up a(n) ____________.

• cell
• organ
• organism
• organ system

What are organ systems?

• A group of cells working together.
• A group of tissues working together.
• A group or organs working together.
• A group of organisms working together. 

When scientists "regrow" body parts for people who have been injured, they often start with cells. Cells with the same function make up ________________.

• tissue
• organs
• organ systems
• organisms

The respiratory system brings in _________ so that it can react with food to produce ________.

• oxygen, energy
• carbon dioxide, energy
• energy, oxygen
• oxygen, feces

The respiratory system brings in ________ while the circulatory system delivers it to _______.

• oxygen, cells
• cells, oxygen
• carbon dioxide, oxygen
• carbon dioxide, tissues

Where does digestion BEGIN?

• Mouth
• Esophagus
• Stomach
• Small intestine

The excretory system _________.

• digests food
• removes waste
• circulates nutrients
• delivers oxygen