Class of crustacea - malacostraca, Biology

Assignment Help:

Class of Crustacea - Malacostraca

Malacostraca involves most of the larger forms such as crabs, lobsters, shrimps etc. and constitute the majority of crustacean species. The cephalic region is formed by using the fusion of five segments; the trunk region contains five thoracic and six abdominal segments. Additionally, a postabdominal telson forms part of the tail fin. A carapace that is covering the thorax may or may not be present. The thoracic appendages called pereopods or walking legs have well developed endopodite employed for crawling and prehension. The thoracic legs have gills, generally modified epipodites. In many malacostracans, first pair of thoracic appendages are modified into maxillipeds employed for feeding. The first five pairs of abdominal appendages called pleopods are the swimming legs. Besides swimming, they may also be used for burrowing carrying eggs in females and frequently for gas exchange. In males the first pair of abdominal appendages are changed as copulatory organs.


Related Discussions:- Class of crustacea - malacostraca

Endocrine interactions, Endocrine Interactions At the beginning of men...

Endocrine Interactions At the beginning of menstruation the inhibitory influence of the corpus luteum on the pituitary is removed and FSH is secreted in increasing amounts. Th

Stentless devices -biological valves, Stentless Devices : A bioprosthesis...

Stentless Devices : A bioprosthesis mounted on a stent reduces the effective orifice area (EOA). The newer version (third generation) stentless gluteraldehyde preserved porcine v

Explain arterial continuous mummer, Explain arterial continuous mummer? ...

Explain arterial continuous mummer? Arterial Continuous Mummer : These originate in constricted arteries as in carotid or femoral artery obstruction (Mummer are louder in sys

What are heterotrophic beings, What are autotrophic beings? What are hetero...

What are autotrophic beings? What are heterotrophic beings? Autotrophic beings are those that can make their own food, i.e., that make organic material from inorganic compound

Region of the injury in the axial skeleton, what major nerve do you think i...

what major nerve do you think is being compressed when a person often feel pain in the posterior surface of the thigh radiating to the area behind the knee and where is the likely

Explain prophylaxis - diarrhea, Prophylaxis Medical Letter consultants...

Prophylaxis Medical Letter consultants generally do not prescribe antibiotic prophylaxis for travelers' diarrhea, but rather instruct thec patient to begin self-treatment when

Pyramid of energy - ecological pyramids, Pyramid of Energy - Ecological Pyr...

Pyramid of Energy - Ecological Pyramids When we wish to compare the functional roles of the trophic levels in an ecosystem, an energy pyramid is probably the most informative.

Define vitamin and mineral supplements for treatment for pem, Define Vitami...

Define Vitamin and mineral supplements for treatment for PEM? All cases of severe PEM require multivitamin preparation to meet the increased demands during recovery. Iron (60 m

Define about skeletal system, Define about Skeletal system Skeletal sy...

Define about Skeletal system Skeletal system provides framework to the body; supports the soft tissues; protects delicate organs. The skeletal system is made up of bones an

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