Brunner's gland. : any of the compound racemose glands in the submucous layer of the duodenum that secrete alkaline mucus and a potent proteolytic enzyme—called also duodenal gland.

Parietal cells or oxyntic cells produce HCl.

It is a starch digesting enzyme present in saliva.

Enterokinase of intestinal juice activates trypsinogen to trypsin.

In a man twelve teeth appear only once in life time, hence called as monophydont.

It is coprophagy e.g., rabbits consume their own faeces.

It converts protein to peptone.

Products of fat digestion are absorbed in the form of water soluble micelles.

Trypsin is an enzyme which changes peptones to peptide.

Zymogen cells in the alimentary canal are found in fundic stomach.

Antixerophthalmia vitamin is vitamin A as it helps prevent xerophthalmia.

Complete oxidation of fats  gives 9.45 Kcal per unit.

It is the First proteolytic enzyme to act on proteins in stomach.

During digestion hydrolytic enzymes break down proteins, carbohydrates, and fats into their monomeric units. So digestion is a process of hydrolysis.

Viamin present in citrus fruit is ascorbic acid.

Fat is mainly digested in duodenum.

Digested food is absorbed mainly from villus of small intestine.

Cholycystokinin contracts gall bladder.

Tusk of elephant is a modified incisor.

The largest gland in human body is liver which performs various vital functions.

Deficiency of cyanocobalamine causes pernicious anaemia.

The wall of alimentary canal from oesophagus to rectum possesses four layers; namely outer serosa, second muscularis, third sub-mucosa and inner mucosa.

Each lobule is covered by a thin connective tissue sheath called the Glisson's capsule.

Stensons duct is the duct of parotid gland. Option 4 is correct.

Their absorption requires bile salt.