font size

Definition of Capillary

Capillary: A tiny blood vessel that connects an arteriole (the smallest division of an artery) with a venule (the smallest division of a vein). Although tiny, the capillary plays an imortant role in the circulatory system. The walls of capillaries act as semipermeable membranes that permit the exchange of various substances, including fluids and the gases oxygen and carbon dioxide, between the blood stream and the tissues of the body.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=9697
Last Editorial Review: 3/19/2012

Drug Medical Dictionary of Terms by Letter

Top RxList Drug News

advertisement
advertisement
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations