Intracellular digestion, Biology

Intracellular Digestion

We all know that unicellular organisms do not have a separate alimentary canal system. All the functions of life are carried out inside a single cell. Food is taken in directly into a cell by phagocytosis/endocytosis and then with the help of enzymes digested in a food vacuole. Figure shows the process of endocytosis in Amoeba.

1216_Intracellular Digestion.png

Figure: Digestion in amoeba

Similar intracellular digestion occurs in sponges, some coelentrates, ctenophores and turbellarians. Although the process is called intracellular digestion, the food material is actually separated from the rest of the cellular material by a membrane which it can cross after digestion. In organisms such as cnidarians and platyhelminths, a gut or enteron is present and here along with extracellular digestion where enzymes are secreted into the cavity, intracellular digestion also takes place within the cells that line the ca2ity. However, in annelids and molluscs more extracellular than intracellular digestion takes place. Digestion is entirely extracellular in nematodes, insects, echinoderms and vertebrates.

Posted Date: 1/15/2013 4:43:38 AM | Location : United States







Related Discussions:- Intracellular digestion, Assignment Help, Ask Question on Intracellular digestion, Get Answer, Expert's Help, Intracellular digestion Discussions

Write discussion on Intracellular digestion
Your posts are moderated
Related Questions
Removal of obturating material -Gutta percha . -Carrier  bassed gutta perca. -silver points . - paste type. - obstructed fracture instrument .

Define Sample Preparation for Haemoglobin Content in Blood Wipe the index finger or middle finger with a cotton swab soaked in spirit. Prick the finger with a lancet op

How you can Repair Ventricular Aneurysm with a patch? Repair of Ventricular Aneurysm with a patch :  Originally described by Cooley, as endoaneurysmorra

1. DNA damaga can be spontaneous or can be 'Induced by external agents a. What are 'spontaneous' mutations? Give examples of causes of spontaneous mutations and the kinds od DNA

Energy demand for Active or moderately active lifestyles? These people have occupations that are not strenuous in terms of energy demands, but involve more energy expenditure t

Fatty acids are a very significant adenosine triphosphate (ATP) and source of energy for various cellular organisms. Over fatty acids, glucose and other nutrients can be stored eff

Nursing Care and Treatment   The only treatment is surgical repair and child may be operated before 18 months as per the choice of surgeon so  that speech pattern of child may

Q. What are the vitamins which make up the B complex? Which problems does the lack of these vitamins cause? Vitamins of the B complex are: vitamin B1 or thiamin, riboflavin, or

1.   Northern blotting The quantity of rna species can be quantified by calculating the quantity of rna through northern blotting which provide size and sequence information

typical growth curve in plants