{"id":15637,"date":"2025-10-11T16:34:31","date_gmt":"2025-10-11T19:34:31","guid":{"rendered":"https:\/\/mol-en.icb.usp.br\/?page_id=15637"},"modified":"2026-05-07T23:17:38","modified_gmt":"2026-05-08T02:17:38","slug":"7-19-bone","status":"publish","type":"page","link":"https:\/\/mol-en.icb.usp.br\/index.php\/7-19-bone\/","title":{"rendered":"7-19 Bone"},"content":{"rendered":"

THE ARRANGEMENT OF LAMELLAR BONE IN THE DIAPHYSES \u2013 4<\/strong>
\n

\n
\nExcepting the articular surfaces, all internal and external surfaces of bones are covered by cell layers called respectively endosteum<\/strong> and periosteum<\/strong>. These layers consist of osteoprogenitor cells, osteoblasts and osteoclasts.
\nThe endosteum is usually a thin layer of only one cell, similar to a simple, non stratified epithelium and is in direct contact with the medullary cavity whereas the periosteum is thicker as the layer of bone cells are covered by connective tissue. <\/p>\n

inner and
\nouter surfaces of the compact bone in this diagram show additional
\nlamellae\u2014the outer and inner circumferential lamellae\u2014arranged in
\nbroad layers. The inner circumferential lamella is covered by a thin
\nlayer of endosteum that faces the marrow cavity, similar to the outer
\nsurface of the bone, which is covered by periosteum. Branches of
\nnutritional arteries accompanied by small veins are shown within the
\nHaversian and Volkmann\u2019s canals. These arteries also supply the
\nperiosteum, endosteum, and bone marrow.<\/p>\n

interstitial lamellae They are found in the outer region of compact bone. External circumferential lamellae lie under the periosteum, while internal circumferential lamellae lie near the endosteum.<\/p>\n

External circumferential lamellae lie under the periosteum, while internal circumferential lamellae lie near the endosteum.
\nCanaliculi containing the processes of osteocytes
\nare generally arranged in a radial pattern with respect to the
\ncanal<\/p>\n

Figure 1. Outer circumferential lamellae placed under the periosteum form the outmost wall <\/strong><\/p>\n

lamellae outer circumferential system<\/strong> is made of stacks of slightly curved parallel bone lamellae. The lacunae occupied by osteocytes are seen as small dark circles.<\/p>\n

Figure 2. The middle of the diaphysis wall intermediate or interstitial lamellae<\/strong> and Haversian systems or osteons<\/strong>. s. It consists of many . Between them are stretches of different lenghts of bone lamellae (highligted in red). <\/p>\n

Figure 3. The internal or innner circumferential lamellae<\/strong> is formed by a stack of parallel bone lamellae of that covers inner surface of the diaphysis.
\nHaversian systems surrounded by small stretches of parallel lamellae and at the right the
\n<\/div><\/div> inner
\n

<\/p>\n
\n
\n
\n<\/a><\/div>\n

1 The external or outer circumferential inner
\ncircumferential
\nlamellae circumferential lamellae<\/strong> is made of stacks of slightly curved parallel bone lamellae. The lacunae occupied by osteocytes are seen as small dark circles.
\n<\/a><\/p>\n

endosteum
\nElsewhere, periosteum, a fibrous connective tissue
\ncapsule covers the outer surface of the bone.<\/p>\n

\n
\n
\n<\/a><\/div>\n

2 The central part of the diaphysis is made of stretches of different lenghts of bone lamellae (highligted in red) that constitute the intermediate or interstitial system of lamellae<\/strong> that placed Haversian systems or osteons<\/strong>. s.
\nIt consists of many . them are <\/p>\n

2 – The external or outer circumferential system<\/strong> is made of stacks of slightly curved parallel bone lamellae. The lacunae occupied by osteocytes are seen as small dark circles.
\n Diaphysis. aversian systems andOuter circumferential system and Haversian systems. Schmorl’s technique. Magnification: medium.<\/p>\n

Schmorl’s technique. Medium magnification.<\/p>\n

\n
\n
\n<\/a><\/div>\n

2 – Haversian systems and inner circumferential system. Schmorl’s technique. Magnification: medium.<\/p>\n

Schmorl’s technique. Medium magnification.<\/p>\n

T. Schmorl’s technique. Medium magnification.<\/p>\n

Inner circumferential system and Haversian systems. Schmorl’s technique. Medium magnification.<\/p>\n

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THE ARRANGEMENT OF LAMELLAR BONE IN THE DIAPHYSES \u2013 4<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-15637","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages\/15637","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/comments?post=15637"}],"version-history":[{"count":95,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages\/15637\/revisions"}],"predecessor-version":[{"id":22371,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages\/15637\/revisions\/22371"}],"wp:attachment":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/media?parent=15637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}