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
larynx , trachea , bronchioles, air sacs , and then diaphragm
Oxygen passes through the nasal cavity, pharynx, trachea, bronchi, bronchioles, and finally reaches the alveoli in the lungs where gas exchange occurs with the bloodstream.
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
The air sacs in the lungs where oxygen passes into the bloodstream are called alveoli. These tiny, thin-walled structures are surrounded by a network of capillaries where gas exchange occurs, allowing oxygen to enter the bloodstream and carbon dioxide to be released.
Gills are the respiratory structures in aquatic animals that remove oxygen from water. They are specialized tissues with a large surface area that allows for efficient exchange of gases. Water passes over the gills, and oxygen diffuses from the water into the bloodstream of the aquatic animal.
Oxygen is the gas that usually passes into cells. It moves by diffusion from the bloodstream.
Oxygen passes out of the bloodstream into tissues where it is used for cellular respiration, the process that generates energy for cells. Oxygen is critical for the production of ATP, which is the main source of energy for the body.
The gas that passes from the bloodstream into the lungs is called carbon dioxide. Carbon dioxide is transported from the tissues to the lungs via the bloodstream, where it is exhaled out of the body during respiration.
Oxygen enters your nose,then goes through the trachea,to the bronchi,and last to your lungs.