Class hirudinea - classification of coelom, Biology

Assignment Help:

Class Hirudinea - Classification of Coelom

These are leeches. Number of body segments of these types of animals is fixed; usually there are 34 segments in a few groups there may be only 31 or even 17. Segments have several annuli. Anterior and posterior sucker present, like also clitellum. No parapodia or setae. Coelom filled along with connective tissue and muscles. Hermaphrodites; direct development, may be terrestrial, fresh water or even marine. The leeches differ in size from 2-6 cm in length, and are flattened dorsoventrally. The clitellum, although present, appears only during breeding season. Their gut is extremely specialized for storage of blood. Though they have only 34 segments, since the segments are marked by transverse grooves they appear to have much more rings (annuli). With regard to coelom, the septa have disappeared, and the coelom is filled along with a connective tissue (botryoidal tissue). The remaining spaces termed as lacunae are filled with coelomic fluid.


Related Discussions:- Class hirudinea - classification of coelom

Leukamia.., is the leukamia dangerous

is the leukamia dangerous

Where in the body is the thyroid gland located, Where in the body is the th...

Where in the body is the thyroid gland located? The thyroid is located in the anterior cervical region (frontal neck), in front of the trachea and just below the larynx. It is

Exchange in alveoli, Exchange in Alveoli The blood that enters the lun...

Exchange in Alveoli The blood that enters the lungs from the heart has been routed through body tissue where mitochondria1 respiration has depleted its oxygen content. It thus

How do kidneys participate in the blood volume control, Q. How do kidneys p...

Q. How do kidneys participate in the blood volume control? How is the blood volume of the body related to the arterial pressure? The kidneys and the hormones that act upon them

Biodiverse ecosystems of economic application, Q. What are some economic ap...

Q. What are some economic applications that can be generated by very biodiverse ecosystems? Extremely biodiverse areas present huge economic potential and they can be a source

What will be the most likely explanation, If a lipid bilayer does not form ...

If a lipid bilayer does not form in a test tube of phospholipids in a liquid solvent and instead the heads join together in a circular pattern, the most likely explanation is: a

Presence and constancy - synthetic characters, Presence and Constancy - Syn...

Presence and Constancy - Synthetic Characters Presence and constancy refer to how uniformly a species occurs in different stands in a community. For example, when a species is

Explain the uses of isp in seafood products, Explain the Uses of ISO in Sea...

Explain the Uses of ISO in Seafood products  Seafood products  The most significant application in this category is the use of ISP in fish sausage and surimi based restructu

Why is the uricotelic excretion essential for reptile, Q. Why is the uricot...

Q. Why is the uricotelic excretion essential for reptile and avian embryos? In birds and reptiles the excretory system is uricotelic since uric acid is less toxic, insoluble an

Surveys - accidents in industries, Surveys - Accidents in Industries T...

Surveys - Accidents in Industries The surveys done in industries have pointed out that leading cause of accidents is the overexertion or workers working beyond their physical

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