THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -2.1 Absorption and digestion of fat. Once dietary fat is consumed, the process of lipid digestion starts in the oral cavity via lingual lipase and the breakdown of TAG, then continues to stomach with peristalsis to form crude emulsions of dietary fat and fat-soluble vitamins.

Detailed explanation-2: -The findings suggest that the lingual serous glands secrete a lipase which catalyzes in the stomach the conversion of triglyceride to partial glycerides and FFA. It is proposed that this reaction is the first step in the digestion of dietary lipid.

Detailed explanation-3: -Lingual lipase generates nonesterified fatty acids (NEFA) from dietary fats during oral processing by lipolysis.

Detailed explanation-4: -Summary: Digestion of dietary fat starts in the stomach, where lingual lipase hydrolyzes triglycerides to free fatty acids and partial glycerides at pH 3.0-6.0. Lingual lipase is secreted continuously from lingual serous glands and accumulates in the stomach between meals, when gastric pH is <3.0.