Transport system in higher animals, Biology

Assignment Help:

Transport system in higher animals

The circulatory system in higher animals has undergone several changes during evolution.
The heart has become totally muscular.
It pumps the blood into well-defined blood vessels
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.
Deoxygenated blood is collected from the body parts and sent to the respiratory system for oxygenation.
In animals, like fish the blood is directly sent from the gills to all the body parts.
In higher animals oxygenated blood is sent back to the heart and then from there to body parts.
Single circuit circulation occurs in fish. In amphibians, reptiles, birds and mammals double circuit circulation takes place.

825_transport system in higher animals.png

Related Discussions:- Transport system in higher animals

Digestion of carbohydrates, Digestion of Carbohydrates Digestion of foo...

Digestion of Carbohydrates Digestion of food starts in the mouth itself by the action of enzyme salivary amylase and the carbohydrates present in the food, particular

Agro industrial-sea weeds, Sea weeds Besides lakes, rivers and ponds, ...

Sea weeds Besides lakes, rivers and ponds, India has two thousands kilometers long coastline and wide variety of aquatic plants are abundantly available which are regarded mor

The excretion by the human kidney, The excretion by the human kidneys 1...

The excretion by the human kidneys 1. Descending limb of Loop of Henle is impermeable to water 2. Distal convoluted tubule is incapable of reabsorbing HCO3 3. Nearly 99 p

Illustrate bite-wing radiographs, Q. Illustrate Bite-wing radiographs? ...

Q. Illustrate Bite-wing radiographs? The short and long-term evaluation of crestal bone loss around implants is best evaluated with intraoral radiographs. Threaded implants mak

Explain about the plateau effect - energy balance, Explain about the platea...

Explain about the plateau effect - Energy Balance? You must have noticed that when people start following weight reducing diets, they lose weight rapidly in the beginning, then

Vaso-constriction, what is a vaso-constriction? what are the effects of vas...

what is a vaso-constriction? what are the effects of vaso-constriction in the skin?

Define observation or inference for fehling's test, Define Observation or I...

Define Observation or Inference for fehling's test? An insoluble reddish brown precipitate of cuprous oxide will be obtained. The reddish brown precipitate indicates the presen

Define classification - taxonomy, Define Classification - Taxonomy Clas...

Define Classification - Taxonomy Classification is the arrangement of organisms into groups having common characteristics. These groups are then arranged according to a system.

Accidents and losses, Accidents and Losses Accident can be considered ...

Accidents and Losses Accident can be considered as an incident occurring without intention and results in injury, loss of body part or even death of a human being or a few per

Phototherapy unit, Phototherapy Unit Principle Photoisomerisat...

Phototherapy Unit Principle Photoisomerisation and photo-oxidation changes indirect bilirubin into water soluble substance. Operational Instruction Adjust

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages