An example of to protrude is what a nose does from a face.
Muscles that allow the tongue to be protruded.
A dark bubble (the amniotic sack) will begin to protrude from the vulva.
As soon as the confluent petioles protrude from the seed they bend down, as they are strongly geotropic, and penetrate the ground.
In dwelling houses without a chimney stack: antennas should not protrude above the highest part of the roof.
The claws protrude from the last bone and so the declawing procedure actually removes this bone.