Transport of Respiratory Gases

Blood is formed by different types of cells; Red blood cells, white blood cells and platelets. Each erythrocyte or red blood cell contains around 300 million of hemoglobin molecules which bind reversibly and rapidly to oxygen gas and carbon dioxide.
-Hemoglobin is transported by the following reversible reaction:

Hemoglobin +oxygen gas ↔ oxyhemoglobin

-Carbon dioxide is transported by the following reversible reaction:

Hemoglobin + carbon dioxide ↔carbohemoglobin

What are the blood constituents that maintain the transport of gases? In which forms are these gases transported?

Source: Wikimedia : http://commons.wikimedia.org/wiki/File:Blood-centrifugation-scheme.png

Gas Exchange

The blood loses some oxygen and takes on carbon dioxide during its passage through different body organs . It regains its normal composition of respiratory gases during its contact with the wall of the alveoli. the thin wall of the alveoli permits easily gas exchange through a phenomenon called diffusion.
How does this exchange occur?

Source: Wikimedia: http://commons.wikimedia.org/wiki/File:Alveoli-no.svg

The Respiratory System

The respiratory system consists of two lungs covered by the rib cage along with the respiratory passage. It permits the exchange of air between the internal human body and the external environment through regular movements of the thorax, ventilation. Gas exchange occurs when blood passes through the alveoli and each organ by a physical phenomenon called diffusion.
How does breathing maintain the gas exchange between the body and the environment? How does this gas exchange occur?

Source : “Illustrated health encyclopedia” http://www.shands.org/health/HIE%20Multimedia/2/9828.htm

Hello!

Welcome to Respiration blog. This blog is offered to grade 9 students. We will use it to share information and post announcements. This will be a great tool in our acadamic year. here we will be able to discover the mystery behind breathing as human beings.

Enjoy the class and have fun together!