What is the human
respiratory system?
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What is the human
respiratory system?
The human
respiratory system
is a system of
organs responsible
for inhaling
oxygen and
exhaling carbon
dioxide in
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Respiratory System Parts and
Functions
Let us have a detailed
look at the different parts
of the respiratory system
and their functions
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Nose
The nose possesses a couple of
exterior nostrils, which are
divided by a framework of
cartilaginous structure termed as
the septum. This is the structure
that evenly separates the right
nostril from the left nostril.
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Larynx
Two cartilaginous chords lay the
framework for the larynx. They are
situated at the point of joining the
pharynx and trachea. It is also termed
as Adam’s apple or the voice box.
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Trachea
The trachea or the windpipe rises
below the larynx and moves down to
the neck. The walls of trachea
comprise C-shaped cartilaginous
rings which give hardness to the
trachea and maintain it by completely
expanding.
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Bronchi
The bronchi divide into
secondary, tertiary, and to
bronchioles, which is again
further divided into small air-sacs
called the alveoli. The alveoli are
minute sacs of air with thin walls,
and single-celled manner.
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Lungs
Lungs are the chief centres of
the respiration in humans and
other vertebrates. They are
located in the thoracic cavity
of the chest near the backbone
and on either side of the heart.
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Exchange of Gases between Lungs and Bloodstream
Inside the lungs, the oxygen is exchanged for
carbon dioxide waste through millions of
microscopic sacs called alveoli. The inhaled
oxygen diffuses into the pulmonary capillaries,
binds to heemoglobin and is pumped through
the bloodstream. The carbon dioxide from the
blood diffuses into the alveoli and is expelled
through exhalation.
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Exchange of Gases between Bloodstream and Body
Tissues
The blood carries the oxygen from the lungs
around the body and releases the oxygen when it
reaches the capillaries. The oxygen is diffused
through the capillary walls into the body tissues.
The carbon dioxide also diffuses into the blood
and is carried back to the lungs for release.
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What is Aerobic Respi
Aerobic respiration is a biological process in which food glucose is
converted into energy in the presence of oxygen. The chemical
equation of aerobic respiration is as given below-
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Energy for muscle
When you are exercising, your muscles
need energy. Inside the muscle cells,
energy is released from glucose, by
respiration. The energy is transferred
to movement energy in the muscles.
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Diet and fitness
Doing regular exercise will
help you to keep fit.
Exercise helps your heart
and breathing muscles to
get strong, so they can
work hard for you when
you need them to.
Exercise also strengthens
your muscles
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Diet and fitness
What you eat also affects your fitness. If
someone eats too much and gets very
overweight, they will become unfit
because:
• the extra mass of their body means
that more energy is needed to move it
around
• the heart has to work much harder to
push blood around the larger body
• the space inside the arteries may get
narrower, because fat deposits build15up
inside them.