Overview of the digestive organs

study tip

Digestive organ

Function

The digestive system is a process that has a start point (the mouth) and an end point (the anus). The table opposite should help you to break down the process for revision purposes.

Mouth

Commencement of digestion Food chewed and mixed with saliva

Pharynx

Swallowing/projects food down the oesophagus

Oesophagus

Pushes the food onwards to the stomach

Student activity

Now complete Activity 1 1.1 in the resources for this book on Dynamic Learning Online.

Digestive organ

Function

Stomach

Mechanical breakdown of food Commences digestion of protein

Small intestine

Chemical breakdown of food Absorption of digested food

Large intestine

Formation and storage of faeces before defecation

Anus

Defecation (expulsion of faeces)

Mouth

Salivary glands

Liver

Gall bladder

Pyloric sphincter

Duodenum Colon

Caecum

IIeocaecal valve

Appendix

Mouth

Salivary glands

Liver

Gall bladder

Pyloric sphincter

Duodenum Colon

Caecum

IIeocaecal valve

Appendix

Oesophagus

Stomach Pancreas Jejunum

IIeum

Small intestine

Rectum Anal canal Anal sphincter

Fig 11.1 The digestive organs

Oesophagus

Stomach Pancreas Jejunum

IIeum

Small intestine

Rectum Anal canal Anal sphincter

Fig 11.1 The digestive organs

KEY FACT

An enzyme is a chemical catalyst which activates and speeds up a chemical reaction without any change to itself. Enzymes are highly specific in that each enzyme catalyses only one type of metabolic action. An example is salivary amylase which will only act on starch but has no effect on protein.

From Pain To Freedom

From Pain To Freedom

From Pain To Freedom is the Latest Scientific and Natural Medicine Breakthroughs to Understand and Relieve the Symptoms of Fibromyalgia!

Get My Free Ebook


Post a comment