Respiration Flashcards
What is respiration
A chemical reaction that occurs in every living cell
What is the word equation for respiration
Glucose + water➡️carbon dioxide + water + energy
Name the three systems involved it respiration
Respiratory, digestive, circulatory
Why do we need energy
Cells use the energy for all their reactions and processes
What are the 6 stages when u inhale
the diaphragm contracts and flattens
the intercostal muscles contract
ribs move up and out
the volume in the chest cavity increases
the air pressure inside the chest cavity and therefore the lungs decreases below atmospheric air pressure.
Air rushes in from the higher pressure outside the mouth into the area of lower pressure in the lungs.
What are the 6 stages when u exhale
the diaphragm relaxes and domes up
the intercostal muscles relax
the rib cage moves down and in
the volume of the chest cavity is decreased
the air pressure inside the chest cavity is increased above atmospheric air pressure
air id forced out
What is ventilation
Getting air in and out of the lungs
What is gas exchange
Gas exchange is getting the gases to move into or out of the blood. Gas exchange is a two way process – waste gases are removed and oxygen is absorbed.
How does ventilation work
Ventilation in humans is the movement of air through the nose or mouth, down the trachea through the bronchi and bronchioles and into the alveoli of the lungs.
What is the digestive system
changes large insoluble food molecules into small soluble molecules that are able to be absorbed into the blood stream.
What is the circulatory system
carries the small soluble food molecules and oxygen to every cell in our body and takes away unwanted waste e.g. carbon dioxide, via the blood
What is the respiratory system
-oxygen is taken into our bodies via the lungs and carbon dioxide is removed. The oxygen is then absorbed into the blood, travels to the heart and is then pumped around the rest of the body.
