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The bladder.
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∙ 14y ago
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Are elephant tusks hollow or not?
I'm pretty sure that they are HOLLOW because if you look at a horn or something made out of a horn than you'll see that its hollow and no one hollowed it out it just came that way so just to sum it up animal thorns ARE hollow.~Yes animal HORNS are hollow, but don't be confused in thinking that every bone-like structure protruding from an animal's head is a horn. If the structure is NOT hollow it is an ANTLER. Examples: Cows and goats have horns. Deer and elk have antlers.
Do penguins have hollow bones?
No. Penguin do not have hollow bones
Examples of hollow bodied animals?
Coral, jellyfish, and aneomes are hollow bodied animals
Are the bones of all birds hollow?
According to Wikipedia (19 Sep 11), all the bones in a bird are semi-hollow: they're filled with structural supports (like organic struts and trusses) and, often, air pockets. But, there are exceptions: some flightless birds (such as penguins, ostriches, emus) have only solid bones.Other answers:None of them are hollow. However, they are much less dense than the bones of mammals. Mammals have a thick, heavy bone structure that is almost solid to support the body weight of each creature on land against gravity. Because bird skeletons must be light enough to fly, the inside of each bone is filled with long, narrow marrow supports that gives the bone both strength and a lightweight structure. However, this also makes bird bones much more fragile than those of mammals. If the bones were to be completely hollow, there is a good chance that they would be so brittle that even flight itself would be dangerous.All of them are hollow but there are a few birds that don't have hollow bones, like the emu or penguin.
Which is the bird that makes its nest in the hollow of a tree?
which bird makes a nest in the hollow of a tree
What type of structure is the great wall if china?
this structre is not a frame structure because it is not hollow i think it is a combination structure because it is solid but has hollow parts!!! anyway look it up some where else this one sucks!!!
What is a word for hollow intestine?
The word is lumen. It means the interior of a hollow tubular structure such as the intestine.
What is the placement of a hollow tube for the purpose of removing urine?
urinary catherter
I have trouble holding urine what do i do?
Consult your doctor.
What structure of the urinary system collects the urine?
The bladder holds the urine 
What is inside a bird's wings?
A hollow bone structure (skeleton).
The hollow portion of a tubular structure a blood vessel?
lumen
What is the holding site for urine in the human body?
The bladder
What type of structure is an igloo?
an igloo is a shell structure since it is not filled it is only a shell
What is the urine forming structure in the kidney?
nephrons
Why is an igloo a frame and a shell structure?
It's a shell. And because it is hallow Inside. A shell structure is a Structure that is strong hollow And light in size.
The hollow portion of a tubular structure, eg, a blood vessel?
the lumen
