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 internal iliac vein starts at the upper region of the greater sciatic foramen, a large gap in the bone of the pelvis on each side of the sacrum. It continues behind the internal iliac artery and reaches the pelvis. From there it meets the external iliac vein, and together they become the common iliac vein.Eventually this vein will flow into the inferior vena cava, which is the largest vein in the human body. These veins drain blood away from the reproductive, urinary, and digestive organs.The internal iliac vein and its branches is are part of several venous plexuses, which are interconnected networks of veins.ventually this vein will flow into the inferior vena cava, which is the largest vein in the human body. These veins drain blood away from the reproductive, urinary, and digestive organs. The internal iliac vein and its branches is are part of several venous plexuses, which are interconnected networks of veins.