Seventy percent of our body mass is water. Without keeping the right amount of water we would die. The kidney is the key means of this control (see later). 6. Temperature. The enzymes that control every chemical reaction in our body work best at their optimum temperature of 37 degrees Centigrade. If our body cells get too hot or too cold they would die.
Hywel Vaughan. answered on 25 Jun 2010: Hi wildrosa, The biggest vein in the body is the âinferior vena cavaâ â this is the vein that returns the blood from the bottom of your body to your heart. The blood is de-oxygenated, and enters the right atrium of your heart â this is at the lower right, back side of your heart.
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.