PPT: Respiration | Physiology - NEET PG PDF Download

 Page 1


R e s p i r a t i o n
Page 2


R e s p i r a t i o n
The Human Respiratory 
System
What is Respiration?
A series of chemical reactions that happens inside 
every living cell, one of the key characteristics 
shared by all living things.
Page 3


R e s p i r a t i o n
The Human Respiratory 
System
What is Respiration?
A series of chemical reactions that happens inside 
every living cell, one of the key characteristics 
shared by all living things.
Why we need oxygen?
Aerobic respiration happens inside our cells and needs oxygen.
It gives us energy and produces carbon dioxide as waste.
We breathe in oxygen from the air using our lungs.
Oxygen goes into the blood and travels to every cell.
Cells use oxygen to make energy.
Blood collects carbon dioxide from cells and brings it back to the lungs.
We breathe out carbon dioxide to remove waste.
Page 4


R e s p i r a t i o n
The Human Respiratory 
System
What is Respiration?
A series of chemical reactions that happens inside 
every living cell, one of the key characteristics 
shared by all living things.
Why we need oxygen?
Aerobic respiration happens inside our cells and needs oxygen.
It gives us energy and produces carbon dioxide as waste.
We breathe in oxygen from the air using our lungs.
Oxygen goes into the blood and travels to every cell.
Cells use oxygen to make energy.
Blood collects carbon dioxide from cells and brings it back to the lungs.
We breathe out carbon dioxide to remove waste.
The Structure of the Human Respiratory System
The respiratory system consists of a network of 
airways that allow air to move in and out of your lungs.
These airways form a branching structure that 
maximizes the surface area available for gas 
exchange.
The white spaces shown in respiratory system 
diagrams represent these air passages - the pathways 
through which oxygen enters your body and carbon 
dioxide exits.
This intricate system ensures that every cell in your 
body receives the oxygen it needs for survival while 
efficiently removing waste gases.
Page 5


R e s p i r a t i o n
The Human Respiratory 
System
What is Respiration?
A series of chemical reactions that happens inside 
every living cell, one of the key characteristics 
shared by all living things.
Why we need oxygen?
Aerobic respiration happens inside our cells and needs oxygen.
It gives us energy and produces carbon dioxide as waste.
We breathe in oxygen from the air using our lungs.
Oxygen goes into the blood and travels to every cell.
Cells use oxygen to make energy.
Blood collects carbon dioxide from cells and brings it back to the lungs.
We breathe out carbon dioxide to remove waste.
The Structure of the Human Respiratory System
The respiratory system consists of a network of 
airways that allow air to move in and out of your lungs.
These airways form a branching structure that 
maximizes the surface area available for gas 
exchange.
The white spaces shown in respiratory system 
diagrams represent these air passages - the pathways 
through which oxygen enters your body and carbon 
dioxide exits.
This intricate system ensures that every cell in your 
body receives the oxygen it needs for survival while 
efficiently removing waste gases.
The Pathway of Air
Mouth and Nose
Air enters your body through your mouth or nose, the beginning of the respiratory pathway.
Trachea (Windpipe)
Air travels down the trachea, which has strong rings of cartilage to keep it open and prevent collapse.
Bronchi
The trachea branches into two bronchi (one for each lung), which also have supporting cartilage.
Bronchioles
Each bronchus divides into smaller bronchioles, allowing air to reach deeper into the lungs.
Air Sacs (Alveoli)
Bronchioles end in tiny air sacs where oxygen enters the blood and carbon dioxide exits.