It travels through a "Pipe" and explodes out the "Vent", or possibly the "Side Vent", and another world for the hole at the top is the Crater.
I think you are thinking of a lava tube, but you may also be thinking of a volcanic vent.
Conduit is the tube through which molten lava travels up to the throat and out into the crater.
The "tunnel" that magma travels through is called a vent.
The solidified lava forming the walls of the lava tube will act to insulate the molten lava. It will therefore cool more slowly than lava at the surface and so will have a lower viscosity (it will be more runny) and so will flow faster than lava at the surface.
A lava flow is basically a stream of lava on the surface. A lava tube is an underground cave through which lava flows downhill. A lava fountain is lava shooting into the air out of a volcano in much the same manner as a water fountain.
Basaltic, low viscosity lava would form lava tube caves.
Pollen grows a tube that travels down to the flowers ovary. From there, the nucleus of the pollen grains passes through the pollen tube to join the nucleus of the ovule to fertilize.
lava tube
The "tunnel" that magma travels through is called a vent.
urethra
fallopian tube
The solidified lava forming the walls of the lava tube will act to insulate the molten lava. It will therefore cool more slowly than lava at the surface and so will have a lower viscosity (it will be more runny) and so will flow faster than lava at the surface.
Can be veins, can be arteries, can be capillaries, can be the aorta..
Urine travels through the urethra to leave the body. The urethra connects the bladder to the exterior of the body.
A lava flow is basically a stream of lava on the surface. A lava tube is an underground cave through which lava flows downhill. A lava fountain is lava shooting into the air out of a volcano in much the same manner as a water fountain.
The barrel of a firearm is the tube through which a bullet travels when a gun is fired.
Blood vessels - arteries, capillaries and veins.
Basaltic, low viscosity lava would form lava tube caves.
Urine leaves the body through the urethra. The urethra connects the bladder to the outside of the body.