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Select your answer:
A  B  C  D  E 

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Topics:

History of Healthcare Lifestyle Diseases Muscles Human Brain Biology Assessment Tenses Atoms and Radioactivity Dermatosis Ears Psychiatry Vitamin Muscoskeletal System Basic Structure of the Human Body Integumentary System Muscle Tissue

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Other quiz: Biology

the backflow of blood stops in veins by …….

A. valves

B. muscles

C. heartbeats

D. lymphatic vessels

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