Vena ni mishipa inayopeleka damu kutoka ogani na sehemu zote za mwili wa binadamu na wanyama mbalimbali kwenda kwenye moyo ili iendelee na mzunguko ikiwa na oksijeni. Merck Manual article on veins American Venous Forum American College of Phlebology American Board of Phlebology Archived 1 Januari 2012 at the Wayback Machine. American College of Phlebology Foundation Archived 9 Juni 2017 at the Wayback Machine. Australasian College of Phlebology Information from the Australasian College of Phlebology Website In economics: Arterial and venous industries Archived 27 Februari 2008 at the Wayback Machine. Animated Venous Access tutorials Archived 13 Mei 2012 at the Wayback Machine. Phlebology: The Journal of Venous Disease Archived 25 Mei 2009 at the Wayback Machine. Phlebology: 1986–1999