She wore a simple blue tube of cloth that left her arm and leg bare.

The gut is a simple tube, that often stands out as a darker central canal through the entire length of the body.

Some burrows are simple tubes a few centimeters long.

The sound waves enter the auditory canal, a deceptively simple tube.

He had more than a simple intravenous tube in his arm.

Unlike in insects, the heart is not divided into chambers, but consists of a simple tube.

They are simple tubes, two or more of which open into a single duct.

Their body organs are small and they possess only a simple tube for a gut.

They consist of simple tubes that hold between ten and twenty paintballs.

The digestive tract is a simple tube, usually with a stomach part way along.