Nervous system and sense organs, Biology

Assignment Help:

Nervous System and Sense Organs

The non-chordates also perform a variety of activities such as feeding, digestion, locomotion etc. For this aim, they have corresponding organs and organ systems working in a coordinated way. Furthermore, the environment of the animal, both internal and external, is never stable and the animal has to change its activities in relation to the changing environmental conditions. This involves escape from adverse climatic conditions or from a pursuing predator, catch food to overcome hunger, digests the food for energy needs, excrete waste material, and regulate the respiratory rate and so on. Towards this purpose, the concerned organs must be coordinated in an efficient and purposeful manner. This is brought about mostly by the nervous system.

Essentially, the animal has to perceive any change in the environment, compute the changes and finally translate these computations into requisite actions in a manner most profitable and adaptive to the animal. In the direction of this goal the nervous system has receptor components consisting of sense organs, coordinating centers in the central nervous system and the motor components controlling the motor elements. The system is connected all through so to say, by cables of nerves through which messages or impulses flow as if on a telegraphic system. The receptor organs receive messages from the environment that are transmitted to the central nervous system. The central nervous system is the decision centre that sends requisite orders to the effector organs through motor neurons.


Related Discussions:- Nervous system and sense organs

Categories of benthic flowering plants, Categories of benthic flowering pla...

Categories of benthic flowering plants Zone of emergent plants Consisting of plants whose roots and stems remain submerged in water and whose upper leaves and ste

What is inharmonious ecological interaction, What is inharmonious ecologica...

What is inharmonious ecological interaction? Inharmonious, or negative, ecological interaction is that in which at least one of the participating beings is harmed.

Genetic material, What is the central principle of molecular biology?

What is the central principle of molecular biology?

Describe the classification of life in diversity of life, Describe the Clas...

Describe the Classification of Life in diversity of life? There are at least 10 million different kinds of living organisms inhabiting Earth. Many different organisms have comm

What are the illustrations of the criminal law, What are the illustrations ...

What are the illustrations of the criminal law? Illustrations of crimes' law: Illustrations of crimes are theft, reckless or murder behaviour. The major aim of illegal

Define about the simple proteins, Define about the Simple proteins? Sim...

Define about the Simple proteins? Simple proteins are those which contain only amino acids or their derivatives and no prosthetic group. They yield only amino acids or their de

Digestion, summarise the comparative anatomy of the digestive system of the...

summarise the comparative anatomy of the digestive system of the invertebrate and the vertebrate.

Difference between ectoparasite and endoparasite, Q. What is the difference...

Q. What is the difference between ectoparasite and endoparasite? The Ectoparasites are parasites that explore the external surface of the host (like, for instance, mites that p

Genes and chromosomes, The gene is a distinct portion of a cell's DNA. Gene...

The gene is a distinct portion of a cell's DNA. Genes are coded instructions for making all the body needs, mainly proteins. Human beings have about 25,000 genes. Researchers have

Explain the groups of diabetes food pyramid, Explain the groups of diabetes...

Explain the groups of diabetes food pyramid The six groups of diabetes food pyramid are shown in Figure below. 1) Fat, oils and sweets (smallest group) 2) Milk 3) Mea

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