The Structure of Bone

The Structure of Bone

This is the structure of bone. Spongy or cancellous bone form the center bulk of all our bones. Its honeycomb structure keeps bone light, in contrast to the heavier, compact bone, which gives it strength. Bone cells or osteocytes are contained in spaces called lacunae. The minute projections of bone cells trail into adjoining channels known as canaliculi. Tissue fluid, which fills the lacunae, allows the transfer of materials between bone cells and capillaries. Haversian systems, each about one-sixtieth of an inch wide, make up the structure of compact bone. Each system is formed by a series of rings called lamellae, which are deposits of mineral salts and collagen fibers. Haversian canals, which run through the center of each Haversian system, contain the blood and lymphatic vessels supplying the bone. Here arteries carrying oxygenated blood are shown in red. Veins carrying deoxygenated blood are shown in blue. The lymphatic vessels are shown in white. A section through the shaft of the femur, a long bone, shows a central mass of spongy bone surrounded by the branching tubular Haversian systems. Blood vessels on the bone surface reach into the center of each Haversian system supplying the bone cells.

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[a1honz]

@AnatomaniaK Latin. Blame the Romans?

[toughguysfullcontact]

God is Great!

[niduberi]

@AnatomaniaK

the narrator had a very peculiar accent pronouncing each of those words. if you hear my teacher say all those words, it sounds more like English than when this guy said them

[DCUPtoejuice]

@SallesTV great. it is still critical/immense/important for strength.

[SallesTV]

@DCUPtoejuice I had a type in my comment i apologize for that , but thats what i was trying to get at. They bot hplay an important role in the strength of the bone, oppose to you what you said about trabecular bone playing an immense role.

[DCUPtoejuice]

@SallesTV again. it is misleading to say "[Cancellous keeps bones light] in contrast to the heavier compact bone which gives it strength". They both play critical roles in strength. This is very obvious if you know anything about osteoporosis where the bone loses strength because the honeycomb structures are lost.

[SallesTV]

@DCUPtoejuice trabecular bone is just another way of saying compact bone which is the layer of bone outside cancellous. There's not one aspect of the bone structure that makes it more important for bone strength than the other...

[simpleleaf1]

You should label it.

[StrengthFromAbove83]

@a1honz latin and greek.

[doctorrodders]

@AnatomaniaK Thats the biggest problem with any medical term! I had to do a talk about familial hypercholesterolemia. Most awkward work I've ever had to say!

[naderhawa1]

wish he adds some kind visual aid so we can see what s this guy is talking about???

[sparkie21]

Havershan? It's Haversian!