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.
Cephalic vein Location. It is located on the lateral side of the left and right arm that runs from the hand to the shoulder. It is not a deep or distal but a superficial vein and hence clearly visible through the skin.ephalic vein Origin. It arises at the radial border of the dorsal venous network of the hand. Here, an accessory cephalic vein, which is a variable vein, passes along the radial border of the forearm to join the large blood vessel near the elbow.