Gills - respiratory organs, Biology

Assignment Help:

Gills - Respiratory Organs

Gills are the specialised respiratory organs of several aquatic animals. They are found in mollusis and as well in many crustaceans. Typically gills are filamentous structures richly supplied with blood. The gills found inside the body are considered to as internal gills whereas those found outside the body are referred to like external gills. Both are meant for respiration. In crustaceans, gills are generally related with appendages. Though, they may vary in form, origin and location. In crayfish, lobster, crab etc, the gills are filamentous, outgrowths from specific thoracic appendages, namely of epipodites and are enclosed in a chamber, and covered by carapace. These gills are generally ventilated by the paddle like movements of special appendages like the scaphognathite. Many aquatic insects have gills. These are usually abdominal or caudal and are called tracheal gills. These take place in nymphs of Odonata, Trichoptera and in larvae of some beetles. These gills are supplied with fine tracheae in place of blood capillaries. The tracheal gills of the nymphs of the dragonfly Aeshna lie in the rectum.


Related Discussions:- Gills - respiratory organs

Cardiovascular endurance component for physical fitness, Define Cardiovascu...

Define Cardiovascular endurance Component for physical fitness? In our previous section on work capacity, concepts of aerobic capacity Vo2 max were described. Cardiovascular en

Explain aabout milk fats - edible fats, Milk Fats  Fats of this group a...

Milk Fats  Fats of this group are derived from the milk of ruminants, particularly cows and buffaloes. Although the major fatty acids of milk fat are palmitic, oleic and steari

Explain the mendel''s laws in genetics, Explain the Mendel's Laws in geneti...

Explain the Mendel's Laws in genetics? Based on the results of his experiments, Mendel proposed three laws regarding the inheritance of traits: the Law of Segregation, the Law

Explain some weight loss during breastfeeding, Explain some Weight Loss dur...

Explain some Weight Loss during breastfeeding? Some women may want to return quickly to their pre-pregnancy weight. It is important to remember that some women will lose more,

Explain cephalosporin, Explain cephalosporin Third-generation cephalosp...

Explain cephalosporin Third-generation cephalosporins, like cefotaxime  (Claforan), ceftriaxone  (Rocephin), cefoperazone  (Cefobid), ceftazidime (Fortaz, and others), or cefti

Explain radiology of the heart, Q. Explain Radiology of the heart? More...

Q. Explain Radiology of the heart? More than a century after its introduction to clinical practice, the chest radiograph (CXR) remains an important diagnostic tool in the routi

Manx cats are heterozygous for a dominant mutation, Manx cats are heterozyg...

Manx cats are heterozygous for a dominant mutation that results in no tails or very short tails, large hind legs and a distinctive gait. The mating of two Manx cats yields two Manx

Pisces, what is the mode of nutrition in pisces

what is the mode of nutrition in pisces

Spoilage of fish, Q. Spoilage of Fish and other Sea Foods Fish and other...

Q. Spoilage of Fish and other Sea Foods Fish and other marine foods are second only to meat and poultry as a staple animal food around the world. India is one of the important f

What are the habits of patients- implants, Habits of patients- Implants ...

Habits of patients- Implants Smoking has been shown to predispose to poor bone quality by reduced vascularity. Therefore it is prudent not to accept heavy smokers as implant pa

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