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

Digestive system - alimentary canal, ALIMEN T A R Y CANAL Endoderma...

ALIMEN T A R Y CANAL Endodermal in origin. Long, 6-9 metres. In herbivorous more long than carnivorous.

What is genetic engineering, What is genetic engineering? The Genetic e...

What is genetic engineering? The Genetic engineering is the use of genetic knowledge to artificially manipulate genes: It is one of the fields of biotechnology.

Histamine - monoamine transmitter group, A fifth member of the monoamine tr...

A fifth member of the monoamine transmitter group is histamine. That release histamine as their neurotransmitter is located in the hypothalamus and project to cerebral cortex, lim

What are extraembryonic membranes, What are extraembryonic membranes? E...

What are extraembryonic membranes? Extraembryonic membranes are membranous structures that appear in parallel with the embryo and play significant roles in the embryonic develo

Explain about the gel bands detection techniques, Explain about the Gel ban...

Explain about the Gel bands detection techniques? Gel bands, resulting from a gel electrophoretic separation, may be detected by staining, radioactive counting or immunoblottin

Explain adverse effects of enfuvirtide, Adverse effects of Enfuvirtide ...

Adverse effects of Enfuvirtide Almost all patients make local injection site reactions to enfuvirtide, usually having of mild or moderate pain, erythema, induration, nodules an

What is cartilage explain briefly, What is Cartilage explain briefly? S...

What is Cartilage explain briefly? Some bones, such as the bones in the skull, develop directly from membranous connective tissue, but in human fetal development, most of the s

Nitrogen fixation in soil, what is the process of nitrogen fixation in soil...

what is the process of nitrogen fixation in soil by bacteria

State the swinging flashlight test, State the Swinging Flashlight Test ...

State the Swinging Flashlight Test The patient looks into the distance while the examiner shines a bright light first into one eye for a few seconds and then the other. As the

Sexual reproduction, SEXUAL REPRODUCTION You must be aware that reproduct...

SEXUAL REPRODUCTION You must be aware that reproduction is one of the distinguishing features of living beings. Reproduction is basically of two types: asexual and sexual. In ase

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages