Red corpuscles fit this description,
A doughnut (donut).
the donughnut shape of the red blood cells is specificly for the oxygen molocule. The blood comes back into the heart from the lungs in the pulmonic artery. and the oxygen molocule sits in the donoughnut hole like a seat cussion.
A puff of smoke that's in a shape of the exhaust pipe A gasket/seal that is shaped like a donut. They are used between the manifold and the exhaust pipe.
A sphere is round - like a tennis ball. A torus is ring-shaped - like a donut !
In the nineteenth century, Elizabeth Gregory fried flavored dough with walnuts for her son Hanson Gregory, hence the name doughnut.A small ring-shaped friedcake.
blood carries some stuff like alcohol, nutrients, and oxygen
Cinder cone volcanoes look kind of like a mound/donut shaped. from the side view, it looks like there's a donut hole at the top in the middle. From the top view, it looks basically like a donut from the top view. =)
They are both shaped like an o. They are both "baked goods." They are both eaten at breakfest.
Well, it's red from hemoglobin inside the cells. It looks like a circle with a dent in the middle, sort of like a donut.
maybe airway obstructions, or lack of hemoglobin which carries oxygen, somethings like that.
The asteroid belt is shaped like a donut. The earth and moon, mars, venus, mercury and sun are all in the hole in the middle.
The Trachea and Artery are the same in the sense that they bring oxygen into the body. They are different in the sense because a trachea move air, and an artery moves blood.