Transport system in higher animals, Biology

Transport system in higher animals

  1. The circulatory system in higher animals has undergone several changes during evolution.
  2. The heart has become totally muscular.
  3. It pumps the blood into well-defined blood vessels
  4. The two chambered heart in fishes evolved into a three chambered heart in amphibians and finally into a four chambered heart in birds and mammals.
  5. Deoxygenated blood is collected from the body parts and sent to the respiratory system for oxygenation.
  6. In animals, like fish the blood is directly sent from the gills to all the body parts.
  7. In higher animals oxygenated blood is sent back to the heart and then from there to body parts.
  8. Single circuit circulation occurs in fish. In amphibians, reptiles, birds and mammals double circuit circulation takes place.

 

825_transport system in higher animals.png

Posted Date: 8/29/2012 9:12:44 AM | Location : United States







Related Discussions:- Transport system in higher animals, Assignment Help, Ask Question on Transport system in higher animals, Get Answer, Expert's Help, Transport system in higher animals Discussions

Write discussion on Transport system in higher animals
Your posts are moderated
Related Questions
How does degradation/destruction differ on different vegatation zoner or at different heights?

Extended point within pulp chamber: Gripping action: -    Steglitz forceps or pin pilers. -    Access cavity flooded with chloroform to dissolve the sealer. -    Grasp the

Define about Aliphatic alcohols - Non Glyceride Fractions? These are water-insoluble, with their content varying from 0.5-7% of the unsaponifiable matter. Rice bran oil contain

Explain the Determination of Vitamin E DL-α-Tocopherol is oxidized with ferric chloride and the ferrous ions formed are measured colorimetrially with the aid of α,α'-dipyridyl

Define Stress Factors - Etiological Risk Factors in Cancer? Emotions playing a part in malignancy are not a new idea. But these relationships are extremely difficult to measure

The type of gene interaction in which effects of one gene override or mask the effects of other entirely different genes is known as: a) Mutation b) Linkage c) Pleitropy

Explain about the Dehydration? Dehydration is defined as the excessive loss of body water. It may occur because of inadequate intake, or abnormal loss of body water or a combin

Q. What are the major divisions and representing species of the gymnosperms? This group of plants can be separated into conifers (pine, sequoia, cypress), that have flowers cal

What are the plant root hairs? Where can they be found and what is their function? The root hairs are external elongated projections of the root epidermis. Their role is to

Need an essay in regard to an experiment that I did. Essay Assignment: Experimental Design Now that you have completed several hands-on lab experiments, take a little time to con