It enters through your nostril (or nare), then goes through the pharynx (upper part of your throat where it meets your nasal passages), down through the larynx (where your vocal cords are), then to the bronchus, is divided by the hylum (where your one bronchus splts into smaller tubes (bronchi) that lead to each of your lungs). The bronchi continue to get smaller and more plentiful as more and more branches form (these are the bronchioles), and end in alveoli. The alveoli are surrounded by capillaries, and since each of these are a single-cell layer thick (increadibly thin!), the oxygen and carbon dioxide can pass from the alveolus to the blood (and CO2 comes out the other way). I freakin love bacon :D
pharynx, larynx, trachea, bronchi, bronchioles
larynx , trachea , bronchioles, air sacs , and then diaphragm
Oxygen enters your nose,then goes through the trachea,to the bronchi,and last to your lungs.
Oxygen is the gas that passes from the lungs to the bloodstream.
Oxygen
oxygen
Oxygen is the gas that usually passes into cells. It moves by diffusion from the bloodstream.
Oxygen enters your nose,then goes through the trachea,to the bronchi,and last to your lungs.
Carbon Dioxide
When you inhale, air fills the alveoli and oxygen passes from the alveoli through a semipermeable membrane and into the capillaries, leading into the bloodstream. During the same process, carbon dioxide is outgassed from the blood to the alveoli When you inhale, air fills the alveoli and oxygen passes from the alveoli through a semipermeable membrane and into the capillaries, leading into the bloodstream. During theWhen you inhale, air fills the alveoli and oxygen passes from the alveoli through a semipermeable membrane and into the capillaries, leading into the bloodstream. During the same process, carbon dioxide is outgassed from the blood to the alveWhen you inhale, air fills the alveoli and oxygen passes from the alveoli through a semipermeable membrane and into the capillaries, leading into the bloodstream. During the same process, carbon dioxide is outgassed from the blood to the alveoli foli same process, carbon dioxide is outgassed from the blood to the alveoli
Your body warms and moistens the air that passes into the lungs to make it easier for oxygen to pass into the bloodstream.
oxygen passes from the air to the blood, where it binds with haemoglobin to form oxyheamoglobin (how it is carried around the bloodstream) Carbon dioxide passes (diffuses) the other way ie. from blood to air inside alveolus, and from there exhaled.
Oxygen is obtained from the atmosphere by a process called Respiration, this involves inhaling air and filling small air sacs in the lung, at which point the oxgen passes into the bloodstream through a process called Diffusion.