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

Vegetative development - development, Vegetative Development - Development ...

Vegetative Development - Development The process of growth and differentiation of cells into organs and organisms is often termed development. For example, the development of

Reproduction, what are different forms of asexual reproduction?

what are different forms of asexual reproduction?

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,

Define contains permitted synthetic food colour, Normal 0 fa...

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

Plant physiology, what is the importance of lignin in xylem formation

what is the importance of lignin in xylem formation

Explain the quebec colony counter, Explain the Quebec Colony Counter? I...

Explain the Quebec Colony Counter? It is used for counting the number of colonies in a plate. Culture plate is kept on the screen which is illuminated from beneath. Counting is

Can high blood pressure cause coronary sclerosis, Q. Can High blood pressur...

Q. Can High blood pressure cause coronary sclerosis? High blood pressure causes coronary sclerosis (hardening in early stages, fatty lesions in the inner surface of [he artery

Population regulation, Population Regulation The number of individuals...

Population Regulation The number of individuals in a natural population varies with time. If the size of a population declines too drastically due to some reason, it may becom

What is the difference between taeniasis and cysticercosis, Q. What is the ...

Q. What is the difference between taeniasis and cysticercosis? The Taeniasis is the parasitic disease caused by the adult tapeworm installed within the human intestine. The

Describe about diagnostic approach congenital heart disease, Describe about...

Describe about diagnostic approach for congenital heart disease ? In this section we propose to outline the principles of a diagnostic approach that is applicable to newborns,

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