VI-Biology Ch-5:Human Body- Respiratory System Syllabus- Respiration, Phases of Respiration, Breathing, Human Respiratory System, Mechanism of Breathing, Ways to Prevent Respiratory Diseases. Topics Covered: - Respiration Phases of Respiration Breathing Human Respiratory System Phases of Respiration in Human Beings Common Respiratory Diseases Ways to Prevent Respiratory Diseases RESPIRATION Respiration is the process of release of energy (ATP) by the breaking down of glucose (an organic substance) present in the digested food of the living body. All organisms including human beings obtain oxygen from the air. When the glucose present in digested food combines with oxygen, it completely breaks down and a large amount of energy is released with the liberation of carbon dioxide and some amounts of water vapours. In respiration, the energy released in the form of ATP(adenosine triphosphate) molecules. It is a chemical process. Glucose + Oxygen -----------> Carbon dioxide + Water + Energy (ATP)
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VI-Biology
Ch-5:Human Body- Respiratory System
Syllabus- Respiration, Phases of Respiration, Breathing, Human Respiratory System,
Mechanism of Breathing, Ways to Prevent Respiratory Diseases.
Topics Covered: -
Respiration
Phases of Respiration
Breathing
Human Respiratory System
Phases of Respiration in Human Beings
Common Respiratory Diseases
Ways to Prevent Respiratory Diseases
RESPIRATION
Respiration is the process of release of energy (ATP) by the breaking down of
glucose (an organic substance) present in the digested food of the living body.
All organisms including human beings obtain oxygen from the air. When the
glucose present in digested food combines with oxygen, it completely breaks
down and a large amount of energy is released with the liberation of carbon
dioxide and some amounts of water vapours. In respiration, the energy released
in the form of ATP(adenosine triphosphate) molecules. It is a chemical process.
Glucose + Oxygen -----------> Carbon dioxide + Water + Energy (ATP)
PHASES OF RESPIRATION
The process of respiration has two stages—Breathing and Cellular
respiration.
BREATHING OR EXTERNAL RESPIRATION
It is a physical process which involves inhaling air rich in oxygen and
exhaling air rich in carbon dioxide.
CELLULAR OR INTERNAL RESPIRATION
It is a biochemical process in which glucose is oxidised to release energy. As
a result of cellular respiration carbon dioxide and water are formed as by-
products.
On the basis of their mode of respiration, the process of external
respiration or breathing is different in different organisms. However, the
cellular respiration is similar in both plants and animals. Both of them take
in oxygen and release carbon dioxide, water and some amounts of energy.
BREATHING
In breathing, an organism takes in (inhales) oxygen from the environment
and releases (exhales) carbon dioxide. It takes place outside the cell and
does not liberate energy. Different organisms carry out breathing process
in various ways. For example,amoeba exchanges oxygen and carbon
dioxide directly with the environment through its cell membrane.
DIFFERENCE BETWEEN RESPIRATION AND BREATHING
Respiration Breathing
1.It is a biochemical process. 1.It is a physical process.
2.It occurs in every living cells of
the body.
2.It involves mainly the lungs of the
body.
3.It involves the breakdown of
glucose into carbon dioxide, water
and energy.
3.It involves the exchange of oxygen
and carbon dioxide through the
body organs.
4.It liberates energy. 4.It does not liberate energy.
5.It takes place inside the cell. 5.It takes place outside the cell.
To have a better understanding of the above-mentioned topic, kindly refer
to the below mentioned link:
https://youtu.be/k9BWCnnXOG8
HUMAN RESPIRATORY SYSTEM
Human beings have a well-developed respiratory system that comprises of
the nose, nasal cavity, pharynx, larynx, trachea, bronchi and alveoli. In
human respiratory system, lungs are the main respiratory organs where
exchange of gases takes place.
1.NOSE AND NASAL CAVITY
Air enters the body through the nose. Externally, the nose consists of two
nostrils. The inner wall of nasal cavity is lined with hair and mucus. The