1: Which of the following is the minimum level of structure needed to perform the function of waste removal?

A: Body System
B: Tissue
C: Cell***
D: Organ

2: Which two systems work with the muscular system to allow the body to move?

A: Digestive and Urinary systems
B: Skeletal and Nervous systems***
C: Integumentary and Endocrine systems
D: Immune and Lymphatic systems

3: Which of the following body systems works with the circulatory system to exchange oxygen and carbon dioxide?

A: digestive
B: nervous
C: respiratory***
D: urinary

4: Which of the following phrases describes the function of the integumentary system?

A: Protective barrier***
B: Nutrient transport
C: Information processing
D: Food breakdown