Alveoli

Yes, Oxygen diffuses through the wall of the alveoli then through the walls of the capillaries. :)

pericadium

The round shape increases the contact surface area, so more air can be exchanged.

3oo million alveoli

gas exchanging

If we think of the lungs as trees branching out, the alveoli are at the end. They are made of up clusters of small delicate sacs. This is where the oxygen you breathe in seeps across into the blood and the carbon dioxide (a "waste product" of all the things the body makes and does) comes out of the blood (and is then breathed out). It is the delicate structure and nearness to the blood vessels that allow this passage of oxygen in and carbon dioxide out. Pretty cool!

The larynx or voice box provides a passage. but the alveoli help

The bronchi continue to divide into smaller and smaller branches until they end in air sacs. The air sacs in the lungs are called alveoli.

the walls of the alveoli are very thin but strong layers of elastic tissue lines with a single layer of flattened epithelium.

Lipoprotein

gas exchange is the intake of the oxygen and the let out of the carbon dioxide

The plants and algae around the world.from air normal

adapted by having a big surface area so it can absorb more oxygen and it contains lots of oxygen. Also it has very thin tubes for diffusion.

surfactant

Probably that is called as chronic fibrosing alveolitis. Very small particles, less than four micron size travel to the alveoli. Alveoli has got no much defence mechanism, but to give in to such an unnatural attack. Never in the history, you had such an insult in the form of pollution, before.

No, teeth aren't bones.

The alveoli (singular, alveolus) are the functional units of the lungs of mammals.

Diffusion is the process that allows the exchange of oxygen and carbon dioxide in the alveoli. This process is one of passive transport.

gases

1.oxygen

2.carbon dioxide

liquids

1.blood

Not sure what exactly you are looking for here... but starting from the mouth:

Pharynx

Trachea

Bronchi

Bronchioles

Alveoli

Expiratory reserve volume is decreased in a patient with emphysema. This patient will struggle to breathe out because air is getting trapped within the lungs. There is also an increase of co2 in the blood because of the inability for the patient to exhale.

gas exchange to take place/to allow cells to lose CO2 and gain O2 so they will be oxygenated and ready to be pumped around your body.

You use the respirerotry system. To be precise when air is to be sucked in, the brain askes the lungs to expand, which naturally creates a low pressure inside the lungs. Similarly when the lungs are compressed the air inside is flushed out.

Carbon dioxide does.

They look like bunch of grapes, only on a microscopic level.