sridhar presentation
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8/14/2019 SRIDHAR PRESENTATION
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RESPIRATION IN HUMAN
This chart of theRESPIRATORY SYSTEM
shows the apparatus forbreathing. Breathing is theprocess by which oxygen inthe air is brought into the lungs
and into close contact with theblood. which absorbs it andcarries it to all parts of thebody. At the same time theblood gives up waste matter(carbon dioxide), which iscarried out of the lungs withthe air breathed out.
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RESPIRATION IN HUMAN
The SINUSES are hollowspaces in the bones ofthe head. Small openingsconnect them to the nasalcavity. The functions they
serve are not clearlyunderstood, but includehelping to regulate thetemperature and humidityof air breathed in, as well
as to lighten the bonestructure of the head andto give resonance to thevoice.
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RESPIRATION IN HUMAN
The NASAL CAVITY
(nose) is the preferred
entrance for outside
air into theRespiratory System.
The hairs that line the
inside wall are part of
the air-cleansingsystem.
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RESPIRATION IN HUMAN
Air also entersthrough the ORALCAVITY (mouth),especially in peoplewho have a mouth-breathing habit orwhose nasalpassages may be
temporarilyobstructed, as by acold.
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The ADENOIDS areovergrown lymph tissue at thetop of the throat. When theyinterfere with breathing, theyare generally removed. The
lymph system, consisting ofnodes (knots of cells) andconnecting vessels, carriesfluid throughout the body. Thissystem helps resist bodyinfection by filtering out foreign
matter, including germs, andproducing cells (lymphocytes)to fight them.
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The TONSILS arelymph nodes in thewall of the pharynxthat often becomeinfected. They are anunimportant part ofthe germ-fightingsystem of the body.
When infected, theyare generallyremoved.
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The PHARYNX
(throat) collects
incoming air from the
nose and passes itdownward to the
trachea (windpipe).
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The EPIGLOTTIS is a
flap of tissue that
guards the entrance
to the trachea, closingwhen anything is
swallowed that should
go into the esophagus
and stomach.
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RESPIRATION IN HUMAN
The LARYNX (voice
box) contains the
vocal cords. It is the
place where movingair being breathed in
and out creates voice
sounds.
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RESPIRATION IN HUMAN
The ESOPHAGUS is
the passage leading
from the mouth and
throat to the stomach. The TRACHEA
(windpipe) is the
passage leading from
the pharynx to thelungs.
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RESPIRATION IN HUMAN
The RIBS are bonessupporting and protectingthe chest cavity. Theymove to a limited degree,
helping the lungs toexpand and contract.
The trachea divides intothe two main BRONCHI(tubes), one for each
lung. These, in turn,subdivide further intobronchioles.
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RESPIRATION IN HUMAN
The RIGHT LUNG is
divided into three
LOBES, or sections.
The left lung is divided
into two LOBES.
The PLEURA are the two
membranes, that
surround each lobe of the
lungs and separate thelungs from the chest wall.
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The bronchial tubes are linedwith CILIA (like very smallhairs) that have a wave-likemotion. This motion carriesMUCUS (sticky phlegm or
liquid) upward and out into thethroat, where it is eithercoughed up or swallowed. Themucus catches and holdsmuch of the dust, germs, andother unwanted matter that
has invaded the lungs andthus gets rid of it.
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RESPIRATION IN HUMAN
The DIAPHRAGM is
the strong wall of
muscle that separates
the chest cavity fromthe abdominal cavity.
By moving downward,
it creates suction to
draw in air andexpand the lungs.
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RESPIRATION IN HUMAN
The smallest
subdivisions of the
bronchi are called
BRONCHIOLES, atthe end of which are
the alveoli (plural of
alveolus).
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RESPIRATION IN HUMAN
The ALVEOLI are the
very small air sacs
that are the
destination of airbreathed in. The
CAPILLARIES are
blood vessels that are
imbedded in the wallsof the alveoli
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Blood passes through the
capillaries, brought to
them by the
PULMONARY ARTERY
and taken away by thePULMONARY VEIN.
While in the capillaries
the blood discharges
carbon dioxide into thealveoli and takes up
oxygen from the air in the
alveoli.
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RESPIRATIONIN HUMAN
PRESENTED BY
A.SREEDHAR REDDY
SCIENCE ASSTZ.P.HIGH SCHOOL LANKALAPALEM
SITES VISITED:-
www.kidport.com
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