Respiatory System Flashcards
(15 cards)
What is respiration?
Why do all living cells respire?
Getting air into and out of the lungs.
This is needed to release energy to make organisms move, grow and make new substances to stay alive.
What substance in the air is needed to keep animals alive?
Oxygen. The respiratory system takes oxygen from the air to react with glucose to release energy
What is aerobic respiration?
Aerobic means “requiring air”
It is a series of chemical reactions as cells use oxygen and glucose to release energy and produce water and carbon dioxide
What is the formula for respiration
.
Glucose from the digestive system
+ oxygen from the breathing system goes to
Carbon dioxide (waste product exhaled) and water and energy
What happens in the respiratory system?
Inhale air lungs expand.
Exhale carbon dioxide lungs contract.
Movement of air is called ventilation.
Oxygen in and carbon dioxide out is called gas exchange
How does blood change?
Bright red when carrying oxygen
Dark red or brown when not carrying oxygen
How do the lungs work to get oxygen in and carbon dioxide out the body?
They contain thousands of air sacs.
Air contains tiny pockets called alveoli.
They give large surface area for absorbing (diffusing) oxygen into blood contained in capillaries
Oxygen is carried in red blood cells
Alveoli are one cell thick surrounded by capillaries with thin walls so substances diffuse in and out of the blood.
Dissolved carbon dioxide diffuses out of blood and into air in the lungs and out of the body
What are cilla
Cells with hair sweep mucus out of lungs and into gullet to be swallowed.
What is mucus
Sticky liquid made in tubes leading to your lungs to trap dirt and dust and germs
What are glucose and oxygen?
What are carbon dioxide and water?
Oxygen and glucose are the reactants
Carbon dioxide and water are the products
Energy is released but is not a chemical substance so put in brackets in the equation
How does glucose travel around the body?
Glucose is supplied by digestion of carbohydrates
Carried around body dissolved in the plasma of the blood
Blood travels through blood vessels and is pumped by the heart.
The heart and blood form the circulatory system.
How does oxygen travel around the body?
Oxygen is absorbed fro the air by the lungs.
The lungs are part of the breathing system.
How does tissue fluid help the breathing system?
Tissue fluid comes out of other capillaries around the body.
It bathes the tissues in the body.
It contains oxygen and glucose.
The cells take oxygen and glucose they put carbon dioxide produced back into tissue fluid.
Tissue fluid soaks into other capillaries and carbon dioxide dissolves in blood plasma.
Key points about carbon dioxide
We exhale more carbon dioxide than we inhale.
The carbon dioxide is excreted by the lungs
Carbon dioxide is tested by limewater which turns clear to cloudy
What is the gas exchange?
Oxygen diffusing into the blood and carbon dioxide diffusing out of the blood
