Define class – arachnida, Biology

Define Class – Arachnida?

The class Arachnida (Arachnida = spider) has terrestrial and few aquatic animals. It
includes spider, scorpions and mites.

1. Prosoma bears. six pair of appendages: one pair of clielicerae, one pair of pedipalpi and four pairs of walking legs.
2. Abdomen is generally devoid of appendages.
3. Respiratory organs are tracheae, book lungs and book gills.
4. Excretion is performed by malpighian tubules and coxal glands.
5. Sexes are separate but sexual dimorphism is not conspicuous.

So, you have refreshed your background knowledge of1.he characters of subphylum Chelicerata and class Arachnida. Let us now study individuals examples under the class Arachnida.

Posted Date: 6/14/2013 5:30:41 AM | Location : United States







Related Discussions:- Define class – arachnida, Assignment Help, Ask Question on Define class – arachnida, Get Answer, Expert's Help, Define class – arachnida Discussions

Write discussion on Define class – arachnida
Your posts are moderated
Related Questions

Define Effect of Nutrition on the Immune System? Nutrition has a strong influence on the immune system of the elderly. Ageing induces dysregulation of the immune system, mainly

Q. What is embryonic sac? Which are the cells that form the embryonic sac? What are their ploidies? The embryonic sac is female gametophyte of angiosperms. The embryonic sac

How different are the respiration in fishes and the respiration in adult amphibians? In fishes gas exchange is completed by direct contact of water with the branchiae (gills).

Soybean protein used as stabilized dispersions Soybean protein concentrates have been used as stabilized dispersions in milk-like beverages and simulated dairy products, such a

Define Resolution - terminologies used in chromatography? Resolution is the effectiveness of the separation and is determined by two factors. These include: Distance

Behaviour change communication is necessary as it ensures that the diabetic patient and their families have access to correct information about the disease, complications, treatm


Composition of Plant and Animal Tissues Food supplies nutrients popularly known as major and minor nutrients based on the quantities in which they are required for the living b

What are the typical vegetation and the typical fauna of the tundra? The Tundra has vegetation formed mainly by lichens and mosses. In the fauna the densely furred animals, lik