study guide 2 - Can you describe compact bone based on...

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Can you describe compactbone based on where it istypically found, the structural
units and the function itserves? Can you do the samefor spongy bone?A.k.a Lamellar BoneStructural Unit: Osteon (Haverisan System)oConsists of an elongated cylinder that runsparallel to long axis of boneoAn osteon cylinder consists of several rings ofbone matrix calledlamellaeWithstands stress and resist twistingCanals and canaliculiCentral(Haversian)canalruns through core of osteonContains blood vessels and nerve fibersPerforating(Volkmann’s)canals: canals lined with endosteumthat occur at right angles to central canalConnect blood vessels and nerves of periosteum, medullarycavity, and central canalLacunae: small cavities that containosteocytesCanaliculi: hairlike canals that connect lacunae to each other ato central canalOsteoblasts that secrete bone matrix maintain contact with eaother and osteocytes via cell projections with gap junctionsWhen matrix hardens and cells are trapped the canaliculi formAllow communication between all osteocytes of osteon apermit nutrients and wastes to be relayed from one cell tanotherInterstitial and circumferential lamellaeInterstitiallamellaeLamellae that are not part of osteonSome fill gaps between forming osteons; others areremnants of osteons cut by bone remodelingCircumferential lamellaeJust deep to periosteum, but superficial to endosteum,these layers of lamellae extend around entire surface ofdiaphysisHelp long bone to resist twistingSpongy Bone: made up of a honeycomb needle-like or flat pieof bone called Trabecule which are filled with red or yellow bone marrow
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Chapter 5 / Exercise 9
Human Biology
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What is the marrow found inthe adult medullary cavitiesfrom that found in the spongybone?
As per the video shown inclass, where would the best sitebe to access red marrow for anadult?Can you describe the cells ofbone, their location andfunction?
2.Osteoblasts

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Term
Winter
Professor
MichaelCanute
Tags
Physiology, Anatomy, flat bone
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Human Biology
The document you are viewing contains questions related to this textbook.
Chapter 5 / Exercise 9
Human Biology
Starr/McMillan
Expert Verified

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