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

Arctic tundra, The northern most biome on our planet is the arctic tundra. ...

The northern most biome on our planet is the arctic tundra. It is a treeless wet circumpolar band between the polar ice caps and the forests to the south. The predominant plants

Anemochory - dispersal of seeds, Anemochory - Dispersal of Seeds Seed...

Anemochory - Dispersal of Seeds Seeds that are dispersed by air currents are usually light or are provided with special structures to help them remain air-borne for long peri

What is the radiographic evaluation, Radiographic Evaluation An intraor...

Radiographic Evaluation An intraoral periapical radiograph with a paralleling technique should be made and observed to ensure absence of pathology in the peri-implant region an

Define the mechanism of evolution, A few statements about the mechanism of ...

A few statements about the mechanism of evolution are made. Mark the correct statements. (i) Evolution happens at the individual level as well as population level. (ii

Constituents of cell walls in bacteria, Q. What are the main respective con...

Q. What are the main respective constituents of cell walls in bacteria, protists, fungi and plants? In bacteria the cell wall is made of peptidoglycans, amongst protists algae

Respiration in organisms, how do honey bees breathe

how do honey bees breathe

Pyramid of energy - ecological pyramids, Pyramid of Energy - Ecological Pyr...

Pyramid of Energy - Ecological Pyramids When we wish to compare the functional roles of the trophic levels in an ecosystem, an energy pyramid is probably the most informative.

Representatives of each protochordate subphylum, Into which subphyla are th...

Into which subphyla are the protochordates divided? What are some representatives of each protochordate subphylum? Cephalochordates and Urochordates (or tunicates) are the two

Fine structure of pollen tubes grown in vitro, Fine Structure of Pollen Tub...

Fine Structure of Pollen Tubes Grown in Vitro The growth in pollen tubes is exclusively restricted to the tip. Cytochemical analysis reveals the pollen tip zone to be rich in

Family is the basic unit of society - child care, Family is the Basic Uni...

Family is the Basic Unit of Society Each child within a family needs love and security to develop feelings of trust and self esteem. Each child is a unique individual who h

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages