★ Cardiovascular System Quiz
What is the main function of valves in the circulatory system?
A. To pump blood throughout the body
B. To prevent blood from moving in the wrong direction
C. To prevent platelets from clotting the blood
D. To keep the body stable
Select your answer:

Topics:
Healthy Living Joints in our Body Eye Physiology Nutrients in Food Human Eye and Colorful World Urinary System Medical Terms DNA and Polypeptide Synthesis Diseases Key Terms Facial & Dental Injuries Ecology & Organisms Head and Neck Anatomy Special Senses Mutation & Genetic Engineering Type of Dementia Blood & Blood VesselsOther quiz:
Nursing Vocabulary › ViewA CHRONIC condition is one that lasts
A. for a short time.
B. until next year
C. a lifetime
D. for 2 weeks
Male Reproductive System › View
How are genetic traits passed down from generation to generation?
A. Chromosomes
B. Reproduction
C. DNA
D. Genes