1. How do we group these levels? Based on what?
1. What are the levels of organization of the body from smallest to largest?
How do we group these levels?
Based on what?

2. ENERGY!!!!!

3. It’s all about ENERGY!!!
NEEDS WASTES

4. Digestive System System Function
Breaks down food into substances the cell can use.
Absorbs nutrients
Removes food wastes.

5. Nutrients BLOOD VESSEL IN 3.
2. Blood carries nutrients. to cell.
BLOOD VESSEL
1.Nutrients absorbed into the blood. IN 3.
Mitochondria uses nutrients to make ENERGY!
Nutrients
ENERGY

7. Respiratory System System Function Brings in O2 needed by cells.
Removes CO2 from the body.

8. 4. Blood carries CO2 . to lungs.
1. Lungs bring in O2 .
2. Blood carries O2 . to cell.
BLOOD VESSEL IN
4. Blood carries CO2 . to lungs.
3. O2 needed to make energy O2
5. Lungs exhale CO2 .
CO2 is a toxic waste.
CO2
OUT
ENERGY

9. Excretory System
System Function:
Remove wastes produced by cell

10. O2 3. Urea is a toxic waste. UREA BLOOD VESSEL IN IN NUTRIENTS OUT
4. Urine is sent to bladder.
BLOOD VESSEL IN
2. Blood carries Urea to the kidney.
3. Urea is a toxic waste. IN
1. Kidney filters (cleans) urea from blood. O2
NUTRIENTS
UREA
OUT
ENERGY

11. Circulatory System System Function:
Transports needed materials and wastes through body.

12. 2. Carries wastes out of cell. Connects body system with the cell.
1. Carries needs to cell.
BLOOD VESSEL
2. Carries wastes out of cell. IN IN O2
NUTRIENTS
CO2
Connects body system with the cell.
UREA
OUT
ENERGY
OUT