★ Respiratory and Circulatory Quiz
Found in the heart and veins and prevents blood from flowing backwards.
A. valves
B. arteries
C. capillaries
D. marrow
Select your answer:
Topics:
Bacteria, Viruses, and Fungi Circulatory, Artery, Vein - basics Non-infectious Disease The Circulatory System Disease Outbreak and Transmission Pathogens Heart Structure and Double Circulation Radiography Children Well-being Antimicrobial Pharmacology Cancer & Cell Cycle Urinary System and Fluid Balance Cells and Organ Systems Immunology and Serology General AnatomyOther quiz:
Teeth & Microbes › ViewYou must brush and floss your teeth after every meal to prevent gum disease and cavities.
A. yes
B. no
Circulatory System › View
Do all animals have circulatory system?
A. yes
B. no