Intracellular digestion, Biology

Assignment Help:

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.


Related Discussions:- Intracellular digestion

What are gonads, What are gonads? What are the male and the female gonads i...

What are gonads? What are the male and the female gonads in humans? Gonads are the organs that make gametes. They have the germ cells that undergo division and generate gametes

Allele that causes albinism is recessive to the allele, The allele that ca...

The allele that causes albinism (p) is recessive to the allele for normal pigmentation (P). A normal woman whose father is an albino marries an albino man whose parents are both no

Endocrine system, INTRODUCTIO N - Endocrinolog y - Study of endocri...

INTRODUCTIO N - Endocrinolog y - Study of endocrine glands, hormones and their effects. Thomas Addison - Father of endocrinology. Described hormonal disease in 1855 kn

Pollen biology, Pollen Biology Fluorescence microscopy coupled with bi...

Pollen Biology Fluorescence microscopy coupled with biochemical analysis has helped resolve the differential activity of the enzyme, β-l, 3- glucanase that catalyses the disso

Secretion of parathormone and calcium blood level, Q. What is the relation ...

Q. What is the relation between secretion of parathormone and the calcium blood level? The parathormone increases the calcium blood level since it stimulates the resorption (re

What is malabsorption syndrome, Q. What is Malabsorption Syndrome? Did ...

Q. What is Malabsorption Syndrome? Did you know that a major part of the absorption of nutrients takes place in the small intestine and the set of enzymes involved in this proc

How is the nervous system of nematodes organized, Q. How is the nervous sys...

Q. How is the nervous system of nematodes organized? Where are the neural chords located in their body? Roundworms have a ganglial nervous system with an anterior neural ring r

What are the main manifestations of leishmaniasis, Q. What are the main man...

Q. What are the main manifestations of leishmaniasis? There are two key forms of leishmaniasis: visceral leishmaniasis and cutaneous leishmaniasis (also known as kala-azar). Th

Administer accurate and appropriate antibiotics, Administer Accurate and Ap...

Administer Accurate and Appropriate Antibiotics: Appropriate antibiotics to which organism isolated from sputum or bonchoscopic aspirate, is sensitive are administered for 4-6

Reason of population growth, Some of the reason for increase in population ...

Some of the reason for increase in population is: 1.         Decline in death for an increase in life expectancy or longevity. 2.         Better medical facilities

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd