• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Describe and explain how the mammalian digestive system is adapted for the digestion and absorption of the food that they ingest?

Extracts from this document...


Mammalian Digestion and Absorption: Dec 2002 Describe and explain how the mammalian digestive system is adapted for the digestion and absorption of the food that they ingest? In mammals the digestive system comprises of six major sites which are the oral cavity, pharynx, oesophagus, stomach, small intestine, and the colon(large intestine). Digestion involves the mechanical, chemical, and physical breakdown of large solid food particles into smaller manageable ones, and also large complex molecules into smaller more simple ones. ...read more.


The salivary glands secrete saliva a mixture of mucous and amylases to act on carbohydrate molecules and also to soften and lubricate the food making it easier to swallow. The salivary glands are stimulated by the presence of smell of food. When the food is finally swallowed the pharynx is met. The pharynx is a chamber which is a junction for the trachea and oesophagus. ...read more.


The stomach is a sac like structure made of five layers which are the mucosa, sub-mucosa, muscualris, serosa and subserosa. The cells involved in digestion in the stomach are mucous cells which secrete alkaline mucous, parietal cells which secrete hydrochloric acid, chief cells which secrete pepsinogen which is the inactive form of the pepsin enzyme, and G cells which secrete the hormone gastrin. When the food material is mixed in with these enzymes and acids a fluid is formed called gastric juice. In this concoction ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Food Technology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Food Technology essays

  1. Structure and function of the digestive system.

    Saliva consists of 99.5% water with 0.5% dissolved substances including mineral salts, salivary amylase, mucin and lysoeme, which is an enzyme that kills bacteria. Salivary amylase, which is a proteins splitting enzyme, begins the process of chemical breakdown turning starch into maltase.

  2. Research question: Do the Chinese fast food chains in Hong Kong behave in oligopoly ...

    The use of central kitchen has other advantages too. It can help to reduce the size of the kitchen in their outlets, thus reduce the rents. Also, as all the complicated food processing is done in the central kitchen, so anyone can be the chief in their outlets, since it does not require many special skills.

  1. Endocrine System

    some cases the use of thyroid hormone to block the hypothalamic mechanism that releases TSH.

  2. The pathway of food molecules through the alimentary canal and the process of their ...

    Pancreatic amylase completes the breakdown of starch to maltase. Pancreatic lipase continues the breakdown of fats into fatty acids and glycerol. Liver cells called hepatocytes produce bile, which is stored in the gall bladder, until it is needed at which point it reaches the duodenum via the bile duct.

  1. Mechanisms of Digestion

    kind of energy or forms of growth whatsoever from the foods that we eat. Different food groups contain different nutrients which help us with different things, some might contain for nutrients required for energy and some might contain nutrients that are required to help us grow.

  2. Produce a document explaining the physiological and anatomical differences between the cat and the ...

    Proper nutrition plays an important role in this balance. Practices of feeding just alfalfa pellets and treats leave a rabbit prone to a variety of ailments such as obesity, foot problems, hairballs, diarrhoea, etc. Grass hay is very important to a healthy digestive tract.

  1. Globalisation and regulation of food risks. A theoretical overview.

    (Tickell and Peck, 1995) These different stages in a continuous process of change result in new social practices, new systems of food provision new food risks and new forms of regulating these risks.4 The shifting structure of the production and trade of tropical food crops form a concrete example of some of these changing practices (see Gibbon, 2001).

  2. We breathe in and out, or inhale and exhale to ventilate our lungs.

    There is the adult set, permanent teeth we have 32. Above:- diagram of a tooth. PULP-containing nerves and blood vessels How to keep your teeth healthy- 1. Clean them at least twice a day. 2. Go to the dentist regularly, (at least every 6 months).

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work