The outline of the head (left) shows the position of the internal cavities (right).

There are several methods for forming internal cavities in extrusions.

Many hornworts develop internal mucilage-filled cavities when groups of cells break down.

They are found in the internal cavities of animals belonging to all classes.

The Fathertree then adjusts the shape and size of its internal cavities to alter the tone.

Dead blow mallets, which have an internal cavity filled with steel or lead shot.

The hollow internal cavity in which the blood flows is called the lumen.

The interior is hollow, with the internal cavity being between 5-9 mm thick.

It resembled the internal cavity of a great white whale.

Mansell required 100 stitches to close an internal cavity in his lower back.