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

Explain about the hypokalemia, Explain about the Hypokalemia? Normal s...

Explain about the Hypokalemia? Normal serum K ranges from 3.5-5 mM/L. Hypokalemia or low plasma K levels can occur with a net shift of K from the plasma to the cells. This shi

What are the hormones secreted by the adrenal cortex, Q. What are the hormo...

Q. What are the hormones secreted by the adrenal cortex? What are their respective functions? The cortical portion of the adrenals secretes hormones of the corticoid (or cortic

Explain what is enzymes, Explain what is Enzymes? Enzymes are organic...

Explain what is Enzymes? Enzymes are organic substances that speed up, or catalyze, a chemical reaction. At a given temperature, molecules have varying amounts of energy, and

Explain what is inversion, Explain what is Inversion ? Inversion is ano...

Explain what is Inversion ? Inversion is another way in which genetic recombination can occur, as seen below. In this case, the change occurs within a chromosome, rather than b

Dentition and feeding, briefly explain filter feeding in holozoicanimals

briefly explain filter feeding in holozoicanimals

What is selective waste collection, Q. What is selective waste collection? ...

Q. What is selective waste collection? The Recyclable waste is waste that can be reprocessed and used again. The waste recycling depends on the separation of the recyclable res

Lysosomes, explain polymorphism in lysosomes

explain polymorphism in lysosomes

How does the inflammation mechanism work, How does the inflammation mechani...

How does the inflammation mechanism work? When some tissue injury happens histamine and other vasoactive substances (known as mediators of inflammation) are released, they caus

Dissection of dog fish, how dissect the dog fish

how dissect the dog fish

Female reproductive system - external genitalia, EXTERNAL GENITALIA - ...

EXTERNAL GENITALIA - Vestibule is covered by 2 pairs of lips labia majoris and labia minoris. At the anterior junction of labia minoris a small erectile clitoris presen

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages