The digestive system converts the food into energy through various combination process involving a number of organs from mouth upto anus the excretory exit.

It comprises of alimentary canal to the anus, involving mouth, tongue, teeth, salivary glands, gullet (food  pipe), liver, pancreas, intestines.

It consists of teeth, tongue, and salivary glands.

Enamel - the hardest and highly mineralized substance, along with dentis, cementum and dental pulp.

32 - Thirty two.

Incissors - 8 - Cutting and biting of the food. Cannes - 4 - For tearing the food. Premolars - 8 - Chewing of food. Molars - 12 - Chewing of food.

Name	Eruption	Shedding
Incissor 1 (Milk)	6-10 months	6-7 years
Incissor 2 (Milk)	8-12 months	7-8 years
Canine (Milk)	16-22 months	10-12 years
Molar 1 (Milk)	13-19 months	9-11 years
Molar 2 (Milk)	25-33 months	10-12 years

Permanent Eruption:
Incissor 1	7-8 years,
Incissor 2	8-9 years,
Canine	10-12 years,
Pre Molar 1	10-11 years,
Pre Molar 2	10-12 years,
Molar 1	6-7 years,
Molar 2	12 years,
Molar 3	17-21 years

Molar 3. Normally erupting between 17-21 years.

Plaque.

They are cavities formed by tooth decay.

Dental Course in Bachelor and Master's level.

Generally called Dentists. Depending upon their speciallization in Gum, Surgery etc, they may be called Orthodontists, Periodontists.

Gums. (Periodontist the specialist on gums)

Canine.

Fluorine.

Skeletal muscle and the strongest in the human body. It is useful for manipulation of food for chewing and swallowing and also feel the taste of the food.

They are located below the tongue and secretes "Saliva" which gets mixed with food and makes the food easy for chewing. Converts carbohydrates into maltose.

A tubular path way for the food to pass, from throat to the stomach. It is generally called Gullet and clinically it is Esophagus - 25 cm long - Also called Pharynx.

7 seconds.

Lies between Esophagus (Gullet) and Dudoenum the beginning of small intestine, on the left side of the abdominal cavity.

It is the second stage of the digestive system. A bean shaped hollow muscular organ which stores food and digests them. In the stomach "Gastric Juices" containing enzymes and hydrochloric acid are secreted. The juice contains 90% water, 5% enzymes and 5% hydrochloric acid. The hydrochloric acid kills all the bacterial germs, while the enzymes (pepsin, renins, and Gastric lipase) and water helps in digestion.

1. Pepsin and Hydrochloric acid converts protein into peptones and proteoses. 2. Renin curdles milk into casein. 3. Gastric Lipase converts fat into glycerol and fatty acids.

A long organ (similar to a tongue or needle leaf) located below the stomach. It produces the pancreatic juices containing several enzymes which act on proteins, carbohydrates and fats. Amylase catalyzes hydrogen of starch, lipase acts on fat, converting it into glycerol and fatty acids. The pancreatic juices along with bile juice (alkaline) from the liver plus the intestinal juices from the small intestine meets the food pulp in the duoderum.

It is a tubular gastro intestinal tract forming the third stage of the digestive system. It is also "gut". It starts from out of the stomach. It is about 6 to 7 metres long and 2 cm in dia. Part of this intestine near the stomach is called Duodenum. It is divided into three parts: Duodenum - 26 cm / 9.84 inches. Jejunum - 2.5 mtr / 8.2 feet. Ileum - 3.5 mtr / 11.5 feet. Actually it is longer than the large intestine. Because of it's width, it is called the small intestine.

It is where the larger part of the digestion takes place. Here the pulpy food gets mixed with bile and pancreatic juices. While on it's movement towards the larger intestine, through the projections in the small intestine, iron, vit. B12, Bile salts, water, sodium, fructose are all absorbed to the body. The movement of the food through food pipe, through stomach and intestines is called Peristalsis movement (contraction of the pipes walls).

The end part of the digestive system also called as colon. It is about 1.4 to 1.5 mtrs long. Major part of the water content from the undigested material received from the small intestine and sends the waste material to the rectum for discharge through arms.

Water, mucin, mineral salts, ptyalin (enzymes).

Ulceration of the stomach.

Lipase.

Pepsin and Renin

Gustation - Gustatory receptors.

Vermiform appendix.

Hydrochloric acid.

Calcium phosphate.

Silver Amalgam.

Magnesium hydroxide.

Peristalsis.

Small intestine.

Hydrochloric acid.

Glucose.

Gastric ulcer.