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.
The common femoral vein dives deep into the abdomen about the level of the inguinal ligament, where it becomes the external iliac vein. internal iliac (iiv) The internal iliac drains the pelvis and joins the external iliac to form the common iliac vein. The external iliac joins the internal iliac vein from the pelvis to form the common iliac. The right and left common iliac veins join at the level of the navel where they form the inferior vena cava. The IVC then courses up to the right atrium of the heart. This is the longest vein in the body.