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 vein with the largest diameter is the vena cava, which is made up of two parts, the superior (that runs along the head) and the inferior (which collects blood from the low â¦ er part of the body). The inferior vena cava is the bigger one.2 people found this useful. Answered. In Human Anatomy and Physiology.he vein with the largest diameter is the vena cava, which is made up of two parts, the superior (that runs along the head) and the inferior (which collects blood from the low â¦ er part of the body). The inferior vena cava is the bigger one. 2 people found this useful. Answered. In Human Anatomy and Physiology.