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Compact bone is the outer most part of the bone. It's dense, strong and made up of many layers. But bones are not solid all the way through- yellow marrow is found within the hallowed out walls of compact bone.

Spongy bone is only found on the ends of bones. Spongy bone isn't really spongy; really it's hard but it has lots of holes- which gives it the appearance of a sponge. Spongy bone is where red marrow is kept. Spongy bone is where blood is made!

Fun Fact: the ribs are made completely of spongy bone.

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13y ago
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14y ago

Compact bone is the hard, outer layer of bone. I.E. The part that you see and think of when you think of bones.
Spongy Bone is the interior of the bone, and also the place where most of the blood cells are formed.
See Also:
How_do_compact_and_spongy_bone_differ_in_structure_and_function

Here is a short article with some good photos and more detail.
http://www.daviddarling.info/encyclopedia/B/bone.html

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12y ago

compact bone is around the edge of the bone and like the name suggests it is compact (more dense and harder) the spongey (trabeculae) bone is porous, it is also in the middle of bones.

Compact bone is on outside and spongy bone is in the inside lol

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general health

Lvl 2
2y ago

It's a major thing when a bone breaks. Even children's bones require time to mend.

Having strong bones as a child provides a healthy foundation for bone health later in life. When we're children and teenagers, we build practically all of our bone density. Around the age of 20, most people have completed their bone development. We continue replace old bone with new bone as adults, but at a slower rate. As we grow older, our bones become weaker.

Children with strong bones are less likely to have bone weakness later in life. Parents may help by ensuring that their children obtain the three essential nutrients for strong bones: calcium, vitamin D, and exercise.

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Wiki User

13y ago

Spongy, it takes 3 years. Compact takes 10.

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14y ago

Compact Bone replaces Spongy Bone in the upper arterial vessels within the bone texture where the fat mostly gets accumulated, having said that excersise and push-ups is your best bet.

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13y ago

hahah it is vary hard. ok boop boop

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Wiki User

13y ago

No

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Wiki User

9y ago

False

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Wiki User

12y ago

compact

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Q: Compact bone is replaced more often than spongy bone?
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