Respiratory Revision Flashcards
What is the respiratory system
The respiratory system moves air in and out of the body using oxygen and eliminating carbon dioxide, a gas produced when cells use oxygen.
The respiratory system includes the nose , throat and lungs
How Air can enter the body and travel to the lungs ?
Air enters the body through either the open mouth or the nose. It travels to the lungs, where the oxygen in it passes into the bloodstream
What is another name for the windpipe?
At it’s bottom, trachea branches into two tubes called bronchi , which leads into the lungs.
What happens to the windpipe, or trachea, before it reaches the lungs?
About half of its 13cm length is inside the chest and the rest is in the neck. The lower end of the trachea divides into two bronchi that carry air into the lungs. One bronchus goes to the left lung the other to the right lung
Oxygen moves from the lungs into bloodstream through??
These small blood vessels, called capillaries, have thin walls that allow oxygen to seep through . This is called diffusion
When we breathe in , we inhale many gases , including oxygen. What happens to the gases that the body can’t use ?
When we breathe air into the lungs, oxygen is absorbed into the blood through the thin walls of blood vessels. Everything else is breathed back into the air , along with the carbon dioxide brought to the lungs from the body’s cells
Which organ is made up of air carrying tubes and tiny sacs ?
Airflows through the lungs’ complicated network of air carrying tubes called bronchiolies, which branch off the windpipe like many branches on a tree trunk. Each branch end in a tiny sac called alveoli, where oxygen passes into the blood
What body structure protects the lungs from outside harm?
The lungs are delicate and can be bruised and even punctured. The rib cage provides protection for the lungs, but because it is rounded, it allows the lungs to fill up like balloons beneath it
Which part of the brain detects the amount of CO2 in the blood?
Medulla oblongata
Which two structures does the trachea lead to in the lungs?
The trachea leads to two bronchi (one is called a bronchus). These further divide into bronchioles.
What are the tiny air sacs in the lungs called?
The tiny air sacs are called alveoli (one is called an alveolus). The bronchioles are narrow tubes that lead to the alveoli.
When we inhale (breathe in), what happens to the pressure in the thorax?
The pressure in the thorax decreases when we inhale. The ribcage expands and the diaphragm moves downwards, which increases the volume of the thorax and reduces the pressure inside. This allows air to be pushed into the lungs from outside.
The loudness of a person’s voice depends on the??
Force with which air rushes across the vocal folds
With the Bohr effect/ effect, more oxygen is released because of an??
Decrease in ph weakens in the haemoglobin oxygen bond
Tidal volume is air ….?
Exchanged during normal breathing
