The heart, or center of a comet is called the nucleus. The nucleus is made of a solid piece of ice surrounded by a cloud of particles and gases.
Is called pulmonary circulation .
Its called the core.
Pericardium
The heart muscle is also referred to as the cardiac muscle (myocardium).
The heart cells are muscle, the type called involuntary muscle.
prancer, dancer, donner, blitzen, dasher, vixen, commet, cupid and Rudolph. that's the names of all of them
go to youtube.com/christianbeadles and make an account and down below the video is a place where you can commet and mabey he'll commet back....
From the Comet up in space
you'll shoot your eye out.
Keep him interested hun!
haleys commet :)
it's a commet
Cinquante
rudoph commet bitzet dasher nasher
Gailileo was a famous astronamer back then who found Gailileo's commet or something!
Heart.
The areas of the heart are called atrium, and ventricals.