Digestive tract, Biology

Digestive Tract

Extracellular digestion takes place in a tubular cavity that extends throughout the length of the organism. All animals after flatworms have-a tubular alimentary organisation open at both ends. The development of extracellular digestion freed many animals from feeding continuously on small particles. They could now quickly ingest a few large chunks of food. The overall tubular organisation of the digestive tract also allows the food to travel in one direction passing through regions of digestive specialisation.

1094_Digestive Tract.png

Figure: Generalised digestive tract. One way passage of food allows sequential stages in digestion. Dashed lines represent crop in some animals

Posted Date: 1/15/2013 4:47:37 AM | Location : United States







Related Discussions:- Digestive tract, Assignment Help, Ask Question on Digestive tract, Get Answer, Expert's Help, Digestive tract Discussions

Write discussion on Digestive tract
Your posts are moderated
Related Questions
Q. What are the major purposes of the organic molecules for living beings? Ans. Organic molecules, like, lipids, carbohydrates and proteins perform several functions for

The initial evaluation of new onset heart failure should include an electrocardiogram, chest radiograph, and B-type natriuretic peptide assay. The cardiac rhythm may be normal sinu

In the living condition (found in sea) you would be able to observe the following features in radiolarians: The cytoplasm is divided by a perforated and chitinous metnbrane into

Q. Despite having a great biodiversity why is the Amazon Rainforest under risk of desertification? The natural soil of the Amazon Rainforest isn't very fertile but it is enrich

What is the problem that the theory of evolution and its rival theories try to solve? The problem that the theory of simply evolution, or evolution, and its rival theories try

Match each item in Column A with the corresponding item in Column B regarding infectious diseases Column A Column B a. Pulmonary tuberculosis i. Enteric infectious protozoan diseas

sea divisions

These circular orifices are located at the upper ends of the outflow parts of the left and right ventricles respectively. The pulmonary orifice which is 3 cms, is 0.5 cm larger tha

Width of the Periimplant keratinized Mucosa Clinical and experimental studies have failed to support the concept of an "adequate width" of keratinized tissue adjacent to natura

Capital Reserves 1. This is raised with selling shares at a premium. As the difference among the market price less floatation costs and par value is credited to the capital re