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Sarcomere Anatomy Blood The Chemistry of Microbiology Disease, Illness and Sickness The Nervous System Human Anatomy Biodiversity Conservation Heredity and Living Cells Protozoan Diseases Skin Growth Brain Principle of Health Science Neuron Structure Axial & Appendicular Skeleton Parts of Human Body

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Molecular Biology › View

Which activity would supply the most oxygen to the body for digestion and respiration?

A. sit-ups

B. running

C. stretching

D. lifting weights

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Human Body Systems › View

Which system includes the mouth, esophagus, and the small and large intestines?
A. nervous
B. excretory
C. respiratory
D. digestive

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