★ Human Body Systems Quiz
What important substance is replenished as blood flows through the heart?
A. iron
B. nitrogen
C. water
D. oxygen
Select your answer:
Topics:
Blood Pressure Bacterial Cell Structure Infectious Disease Muscle & Nerve Tissue Ears Life Processes - Digestion and Respiration Nutrition and Human Digestive System Micro Immunology Sarcomere Anatomy Skeletal System Homeostatic Imbalances Clinical Pathology Muscle pathophysiology Smoking Related Diseases Nephrology (Hemodialysis) Skin DiseasesOther quiz:
Human Excretory System › ViewWhat is #1?
A. Kidney
B. Ureters
C. Bladder
D. Urethra
Liveability › View
Which continent might be considered the most dangerous for outdoor air pollution?
A. Africa
B. Australia
C. North America
D. Asia