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.
The fact that some pure solutions of hydrocarbons do not readily evaporate at room temperature is a result of- Select one: a. London dispersion forces. b. The hydrophobic
A n i m a l pharming Using animals as bioreactors is also cost-effective and advantageous because animals naturally carry the cellular mechanisms needed to
In the previous section we discussed the concept of species in detail and concluded that the concept of biological species and Mayr's definition of species have a wide acceptance a
Is gene a triplet of consecutive DNA nucleotides A gene isn't a triplet of DNA nucleotides with their respective nitrogen-containing bases, like CGT or AAG. The nucleotide trip
classification schemes and characterisitics used for this.
1. Name four experimental techniques to determine protein-protein interactions other than X-ray & NMR techniques. 2. How common are Coiled-coil motifs? Where are they found? Giv
Phases of Seed Formation The process of seed formation can be divided into two phases: The division phase, in which fertilised egg divides mitotically and complet
Why does bark often die and break naturally? The bark is the mature periderm of the stem, branches and roots. It dies and breaks when these structures grow and thus the perider
what is appendages in reptilia
Define crucial periods of a woman's life - pregnancy and lactation? In this unit, we studied about the most crucial periods of a woman's life, pregnancy and lactation, especial
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd