The digestive tract of typical bivalves consists of an oesophagus, stomach, and intestine.

The lower respiratory tract consists of the trachea (wind pipe), bronchial tubes, the bronchioles, and the lungs.

The tract to the west, known as the Rarh, consists of hard clay and nodular limestone.

The upper gastrointestinal tract consists of the esophagus, stomach, and duodenum.

The other tract, the 1,740-acre Perkins estate, consists of rolling hills, farm land and forests.

The tract consists now of more than 6,400 acres.

A tract typically consists of about 10 to a few hundred such units.

The upper respiratory tract (upper airway) consists of the nose, mouth, sinuses, and throat.

The lower respiratory tract consists of the trachea, bronchial tubes, and the structures inside the lungs.

The urinary tract consists of the kidneys, the bladder, the ureters and the urethra.