Melting point: Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.
Overall, in humans, the large intestine is about 1.5 metres (5 ft) long, which is about one-fifth of the whole length of the gastrointestinal tract.
SMALL INTESTINE. The intestinal phase of digestion begins with the small intestine (see Fig. 26-1). The small intestine is the longest part of the digestive tract, approximately 20 feet (6.1 m) long and 1.5 inches (3.81 cm) in diameter.It lies coiled on itself so it can fit into the abdominal cavity.It is about 18 feet longer than the large intestine, which follows it.he small intestine is the longest part of the digestive tract, approximately 20 feet (6.1 m) long and 1.5 inches (3.81 cm) in diameter. It lies coiled on itself so it can fit into the abdominal cavity. It is about 18 feet longer than the large intestine, which follows it.