Topics: Your Body Quiz
When you walk, muscles in your legs contract and relax. This is a great example of the ____ system in action.
A. muscular system
B. circulatory system
C. execratory system
D. nervous system
Select your answer:

Topics:
Hazards & Risks Nutrients in Food Oral Surgery Skin and Derivatives Anatomy: Muscle Child Development Teeth and Microbes Urinary Molecular Basis of Inheritance Vision Teeths Mnt For Pulmonary Disease and Adverse Reactions to Food Endocrine System and Nervous System Cardiorespiratory or Vascular Systems Nutrition VocabularyOther quiz:
DNA Structure and Function › ViewWhat is the first step in replication of DNA?
A. unzip the double helix structure
B. unwind the double helix structure
C. rewind the double helix structure
D. duplicate the double helix structure
Anatomical Terminology › View
What region is known as the eye?
A. cephalic
B. orbital
C. mental