Cnidarla, Biology

Assignment Help:

Tlie phylum Cnidaria or Coelenterata, includes the faliiiliar hydras, jelly fishes, sea anemones and corals. You have olreacly studied about Cnidarialis in Units 4 and 7 of LSE-09 course. These are often brilliantly colourcd. They exhibit radial symnietry, The Cnidarians possess two basic metazoall structural features. Onc, there is an intenla1 space for digestion, called in Cnidarinns as gastrovascular cavity. This cavity lies along the polar axis of the animal atid opens to tlie outside at one end to for111 noutli, Tlie presence of a mouth a~id digestive cavity permits the use of a mucll greater rnlige of food sizes than is possible in tlie protozoarls and sponges. Two, in Clidariails a circle of tentacles, representing exte~lsiolls of the body wall, surrounds tlie ~lioiltli to aid in tlie capture and ingestion of food. Tlie Cnidarian body wall consists of three basic layers: an outer lnycr of cpidennis, nn inner layer of elidoder~nal cells lining Ilie gastrovnscilar cavity, and between these two a layer called mesoglea. The rnesoglea ranges from n tliin, non cellilar membranc to a thick, fibrous, jelly-like, coid lnaterial with or without wanderillg a~noebocytes, A considerable number of different cell types compose tlie epidermis and gastrader~nis, but there is only a limited degree of organ development.


Related Discussions:- Cnidarla

Explain the transport of amino acids, Explain the Transport of Amino Acids?...

Explain the Transport of Amino Acids? More than one transport or carrier system functions in the absorption of amino acids. The active carrier system for neutral amino acids sh

Define some example of acidic and basic buffer, Define Some Example of Acid...

Define Some Example of Acidic and Basic Buffer? Frequently used example of acidic and basic buffer includes: - Acidic buffer: a mixture of CH 3 COOH (acetic acid) + CH 3 C

Management with insulin, Type 1 Diabetes Mellitus occurs when the body's im...

Type 1 Diabetes Mellitus occurs when the body's immune system destroys beta cells. Beta cells produce insulin, a hormone that helps to move the glucose contained in food into cells

Explain Stirred-tank bioreactors, Normal 0 false false fals...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Gangrenous dermatitis (necrotic dermatitis), G a ngrenous dermatitis (nec...

G a ngrenous dermatitis (necrotic dermatitis) A bacterial condition in chickens caused by spores of Clostridium septicum , sometimes that of Cl. novyi / Cl. edematiens a

Respiratory chain to produce atp, Decreasing power is available in a cell b...

Decreasing power is available in a cell both as NADPH and NADH but these have quite distinct roles. NADH is oxidized by the respiratory chain to produce ATP by oxidative phosphoryl

Define depolarization of the neuronal plasma membrane, Q. How is the depola...

Q. How is the depolarization of the neuronal plasma membrane generated? How does the cell return to its original rest? When the neuron receives a stimulus by the permeability o

Pulse oximetry - diagnostic tests, Pulse Oximetry: Procedure: Pulse Ox...

Pulse Oximetry: Procedure: Pulse Oximetry is a safe and  simple method of assessing oxygenation. An  advantage is  that this method  is noninvasive and continuous. Previously,

Explain process of rice milling, Rice milling Rice milling involves the...

Rice milling Rice milling involves the following processing steps: rough rice (paddy rice) → hull removal  →  brown rice  → polishing to remove the bran coats (fruits and seed

Define the history of food microbiology, Normal 0 false false...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

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