Bloody or tarry stools refer to a stool sample thatâs either dark red or black in color. Bloody or tarry stools can indicate bleeding or other injuries in your gastrointestinal tract. You may also have dark, discolored bowel movements after eating dark-colored foods.
The longest vein in the body is the great saphenous vein, a superficial vein found in the leg.he deep veins are essenti â¦ ally a column of blood running from your head to you feet and so when one is standing are under high pressure. In order to keep this pressure away from the frail superficial veins the penetrating veins have valves.
Veins of the Face. The facial vein is a large vessel of the face and is much less tortuous than the artery of the same name. It lies posterior to the facial artery and begins from the lateral side of the nose. It drains the external palatine vein and will go on to join the retromandibular vein. This then forms the common facial vein.