Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Functional regions of digestive system
In general the digestive system of metazoans is divided into 4 major functional regions of:
The region for reception is associated with devices for mastication or chewing of food (like teeth); for paralysing the struggling prey (toxic enzymes from saliva); initiating digestion and lubricating the food with mucous. The oesophagus of chordates and some invertebrates serves to conduct the bolus (mass of chewed food) by peristaltic movement from buccal cavity. In some animals this region has a crop for storage. The crop in birds is also used to ferment mildly or digest food. This is later regurgitated by parent birds for their nestlings. The storage region allows the animals to store food and use it when it is not easily available. For example, leaches take in infrequent large meals of blood and digest it slowly over a month.
The herbivore animal spends hours masticating the food it takes in hurridly and stores it in its stomach for further use. In the third region or digestive region the enzymes reduce the food to a form that can be absorbed by the body of the organism. As the food is digested, the absorbable food is passed to the blood stream and the unabsorbed material is stored briefly in the final section of the alimentary canal where further removal of excess water and, consolidation of undigested material into faeces takes place, before it is expelled out of the body. In vertebrates this function is carried out in the large intestine. In higher vertebrates, each area of the gut is specialised for a certain activity, digestive enzyme are produced in glands as well as in the wall of the gut. Absorption occurs in the intestine predominantly.
Galvanotaxis - Modes of Cell Movement Galvanotaxis considers to the movement of cells in response to a potential variation between cells. It is suggested that there are voltag
The frontal cortex is in what anatomical direction with respect to the occipital cortex? a. anterior b. posterior c. sagittal d. inferior
Explain about the Thiamin - Vitamin B or aneurin? Thiamin is one of the earliest recognized vitamins. The chemical structure of thiamine was established by Williams in 1936. Th
Explain about the Commercial Sterilization? Sterilization is the most extreme heat treatment given in preservation of food by heat. Usually target organism is a heat resistant
Define Requirements of Vitamins and Minerals during Surgery? Normal tissue stores of vitamins are required for the metabolism of carbohydrates and protein. Deficiency states li
Chronic Aortic Regurgitation : Several factors have to be taken into account before recommending surgery. These include severity of symptoms and LV function. With evidence o
what is the economic importance of obelia
human digestive system
Q. Etiological factor of peptic ulcer? Peptic ulcer results when the neural and hormonal abnormality disrupts the factors that normally maintain mucosal integrity and permit pr
Some organisms contain enzymes that condense a fatty alcohol and a fatty acid to generate wax esters. Draw decanol, plamitic acid (C16:0 fatty acid) and the resulting wax ester gen
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd