air sac

There are millions of these air sacs in our lungs.

Each was nearly two feet long, but full of cavities and air sacs.

Facial air sacs under their skin help protect the impact with the water.

Thus, they are able to use a series of air sacs connected to the lungs.

Evidence of air sacs has also been found in theropods.

In addition to their lungs, they have peripheral air sacs along each side.

In many areas, the delicate air sacs were torn, but that had happened long ago.

The air sacs in the lungs tend to stay collapsed.

On careful dissection, around eight air sacs can be clearly seen.

Most birds have hollow main bones with air sacs in them.

They use these air sacs to migrate up and down in lakes.

There are subcutaneous air sacs in the lower body and along the sides.

If air sacs are the key to huge size, then it is little wonder that mammals never grew as large.

In addition, the lining of the air sacs is too thick to allow gas exchange.

After the treatment, they said, damaged air sacs in the lungs returned to normal size and number.

Air sacs in the respiratory system do not directly contribute to gas exchange.

We have air sacs, I explained quietly, feeling as if my throat were closing.

It also caused blood clots to form in the air sac channel.

So far no evidence of air sacs has been found in ornithischian dinosaurs.

A few days later she was admitted to the hospital, the air sacs of her lungs collapsing.

Its skeleton was filled with air sacs, which lightened the weight.

Air flow depends on the pressure changes of the air sacs.

Each air sac is covered with tiny blood vessels.

Air sacs are not the entire picture, though.

I filled my air sac and began to umble counterpoint.