Cardio-respiratory System Flashcards
What is the cardio respiratory system made up of
Circulatory system
Respiratory system
What’s in the circulatory system
Heart
Blood vessels
Blood
What’s in the respiratory system
Lungs
Airways
What’s the main function of the cardio respiratory system
It enables the body to breath and pump blood and oxygen around the body
It works harder when doing physical exercise
What does the respiratory system do
Brings o2 into the body which is used to produce energy and enable activity
Removed co2 from the body which is produced in the musicale
Give the flow diagram of the respiratory system
Mouth\nose Travels down trachea Into right/left lungs To bronchioles To alveoli / capillaries To lungs
What happens to oxygen in the first 2 steps of gaseous exchange
Breathed in and passed through the alveoli and into the red blood cells in the capillaries
Then in the capillaries it combines with haemoglobin which forms oxyhemoglobin
Then this is carried around the body
How does co2 leave the body in gaseous exchange
Haemoglobin carries co2 from the body to the capillaries
It’s passed through capillaries to Alveoli and is breathed out
Give four facts about the alveoli
1 cell thick
Large moist surface area for gaseous exchange
Numerous capillaries run across for a large blood supply
Bring in o2 and carry out co2
What is the diffusion pathway
The distance the molecules tracked which is short in gaseous exchange
What is diffusion
All gases move from an area of high concentration to an area of low concentration in an attempt to reach equilibrium
What does the blood in the capillaries have
A high concentration of co2
Why does co2 diffuse from the blood in capillaries to air in alveoli
Because the air in alveoli has a much lower concentration of co2 than the blood in the capillaries
Why does the oxygen diffuse from the air in alveoli to the blood in capillaries
Because the blood has a low concentration of oxygen as it has already been used in body cells so the highly concentrated oxygen in alveoli moves to the less concentrated blood in capillaries
What is a haemoglobin
A protein found in the red blood cells that transports oxygen around the body and co2 out the body
