Major Body System Report. The trunk of the human body is divided into three cavities; the thorax, abdomen and the pelvis.

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Major Body System Report.

The trunk of the human body is divided into three cavities; the thorax, abdomen and the pelvis.

A fibro-muscular layer, the diaphragm, separates the thorax (upper chest) from the abdomen. The pelvis lies beneath the abdomen but there is no physical separation. The oesophagus, aorta and vena cava penetrate through the diaphragm.

The following systems are major systems within the body.

The Renal System.

The Renal system is made up of kidneys, ureters, bladder and urethra, all of which are involved in the formation and release of urine.

The human body has two kidneys which are organs shaped like a bean; they produce urine to get rid of the body's unwanted waste. The Ureters transport the urine to the bladder; these are two tubes that emerge from the kidneys to the bladder. The Bladder stores the urine until it is excreted via the urethra. The sphincter muscle controls the release and pressure of urine.

A secondary function of the kidneys is contributing to the control of blood pressure and production of red blood cells. Blood is supplied to the kidneys via the renal arteries which are smaller vessels