Yr8 - respiratory system
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Transcript of Yr8 - respiratory system
Respiratory System The respiratory system is made up
of:
Nasal Cavity
Epiglottis
Trachea
Lungs
Bronchi
Bronchioles
Alveoli
Diaphragm
Ribs
Epiglottis
Nasal Cavity Air enters the nasal cavity where it is
warmed and moistened
The hairs inside your nostrils filter large dust particles and the finer hairs called cilia help collect the smaller particles
Epiglottis
The epiglottis is a thin flap of tissue made out of cartilage
The epiglottis is located at the opening of the windpipe.
It prevents the food and liquids from entering the windpipe.
Trachea• The trachea also know as the windpipe, is the pipe that connects your mouth and nasal cavity to your lungs.
• The tracheas walls are thin but reinforced with firm material rings of cartilage (you can feel them if you run your hand down your throat)
• These rings of cartilage keep your trachea from collapsing when you breath in.
Bronchi & Bronchioles The trachea divides into
two bronchi (singular bronchus)
The bronchi are tubes that take air from the trachea to the lungs
The bronchi divide into even smaller tubes called bronchioles
Alveoli Have a very large surface area
Allow gas exchange between the lungs and bloodstream
Oxygen goes into the bloodstream
Carbon dioxide comes out of the bloodstream
Blood then delivers oxygen to cells around your body so respiration can occur
DiaphragmThe diaphragm is a
sheet of muscle that separates the chest from the abdomen
It controls breathing by moving up and down Diaphragm
RibsThe ribs protect the
heart and lungs
They are a part of the skeletal system (all the bones in your body)
Things to Remember! Breathing – pulling air into your lungs, pushing air
back out of your lungs
Gas exchange – happens in the alveoli, oxygen goes in, carbon dioxide comes out
Respiration – chemical process that happens in cells, creates energy