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The primary organs of the respiratory system are the lungs,

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Kalia Andrews

on 5 May 2014

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Transcript of The primary organs of the respiratory system are the lungs,

The primary organs of the respiratory system are the lungs, which function to take in oxygen and expel carbon dioxide as we breathe.
The gas exchange process is performed by the lungs and respiratory system. Air, a mix of  oxygen and other gases, is inhaled.

In the throat, the trachea (windpipe) filters the air. The trachea branches into two bronchi, tubes that lead to the lungs.
Once in the lungs, oxygen is moved into the bloodstream. Blood carries the oxygen through the body to cells to create energy to keep the body going.





Red blood cells collect carbon dioxide from the body’s cells and transports it back to the lungs.
An exchange of oxygen and carbon dioxide takes place in the alveoli, small structures within the lungs. The carbon dioxide, is exhaled and the cycle begins again with the next breath.
The diaphragm is a dome-shaped muscle below the lungs that controls breathing. When inhaling the diaphragm pulls forward, drawing air into the lungs. When exhaling the diaphragm expands to force air out of the lungs.
Adults normally take 12 to 20 breaths per minute. Strenuous exercise drives the breath rate up to an average of 45 breaths per minute.

Respiration is the process where oxygen and carbon dioxide s transported in and out of the blood.

Cellular respiration occurs inside your cells and is the basic process which makes ATP (adenosine triphosphate) which is a form of chemical energy.



Respiratory System
The alveolar walls are extremely thin (about 0.2 micrometers).
The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.
In terrestrial animals, this is happens by breathing.
The human body needs oxygen to sustain itself. After four to six minutes without oxygen brain cells are destroyed and an extended period without oxygen can lead to brain damage and death.

Asthma
 is inflammation of the bronchi and bronchioles which causes a restriction in the airflow into the alveoli creating breathing difficulties.

Chronic obstructive pulmonary disease
(COPD) is a progressive disease that makes in increasingly difficult for sufferers to breath.

Lung cancer
mostly affects smokers but non-smokers can be affected too.  Like all cancers it is caused by the uncontrolled growth of abnormal cells.
Some other illnesses involving the respiratory system are respiratory infections, including tuberculosis, pneumonia and influenza.

Cellular respiration

Formula;
C6H12O6 + O2 → CO2 + H2O + Energy

Word equation;
Glucose + Oxygen → Carbon dioxide + Water + Energy/ATP
Aerobic respiration
Respiration is not the same thing as breathing (ventilation). Respiration is a chemical process in which energy is released from food substances, such as glucose - a sugar.
Aerobic respiration needs oxygen to work.
The equation for aerobic respiration is:
glucose +
oxygen
→ carbon dioxide + water (+ energy)

(Anaerobic respiration is respiration without oxygen it produces: Lactic acid, ATP, Ethyl alcohol, carbon dioxide)
Oxygenated blood from the lungs is pumped back to the heart through the pulmonary veins and then pumped to the rest of the body. The deoxygenated blood travels from the body to heart where it is pumped through the pulmonary arteries to the lungs to be replenished
The left side of the heart pumps the blood to the lungs, this side has less distance to pump the blood compared to the right side of the heart which pumps blood to the rest of the body; because the left side is pumping blood less distance, it is smaller.
Diseases Involving the Lungs
Summary
Why do mammals need a respiratory system?
Respiration is the process which diffuses oxygen in and carbon dioxide out of the blood stream. Oxygen in the blood stream is delivered to cells meaning that aerobic respiration can happen. This means that ATP can be produced (a form of energy) supplying the body with the energy it requires to properly function. The process which is used to deliver oxygen and carbon dioxide in and out of the lungs is called ventilation or breathing.
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