How do we group these levels? Based on what?

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Presentation transcript:

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?

ENERGY!!!!!

It’s all about ENERGY!!! NEEDS WASTES

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

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

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

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

Excretory System System Function: Remove wastes produced by cell

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

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

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

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