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.