Select your answer:
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Micro Immunology Benefits of Physical Activity The Ear Skeletal System Vocabulary Physiology Hospital Wards and Departments Macromolecules & Enzymes Skin Appendages Parts of the Brain Renal Replacement Therapies Healthy Lifestyle Disease and Conditions Skeletal System Illness and Symptoms Thyroid Skin DiseasesOther quiz:
Respiration Anatomy and Physiology › Viewthe thoracic cavity expands via active muscle contraction (diaphragm & intercostals)
A. inhalation
B. exhalation
Human Anatomy Study Guide › View
The system that provides oxygen to the cells is the
A. digestive system
B. muscular system
C. urinary system
D. respiratory system