Microscopic Structure of Spongy Bone ( Cancellous Bone )

Cancellous bones are less dense and present with large cavities in the between flats of bone giving them a honeycomb appreance bone.

Cancellous bone is made up of a mashwork of bone or rods called Tradeculae.

It does not contains osteons.

Each Tradeculae is made up number of lamella between which there are Lacunae containing Osteocyte.

Lucuna are interconnected Canaliculae the Tradeculae enclosed wide space that are filled by Red bone marrow.

They receive nutrition from blood vessels in the bone marrow.

The Tradeculae are covered extremely by vascular endostem.

Endostem is the lining membrane of the bone marrow cavity.

Microscopic Structure of Compact Bone

It is made up of many tube like structure called Osteons ( Haversion system ) .

In between Osteons a central canal present.

The central canal blood , nerve lymphatic vessels are present.

Central canal are connected neighbouring canals by perforated canal.

If cut a series of Osteon are seeing parallar series called Lamellae.

In Lamellae present small pockets or cavities called Lacuna , ( Containing Osteocytes ) Osteocytes cell maintain bone tissue.

Each Lacuna are connect by canaliculus.

Canaliculus are contain interstitial fluid ( flow in canaliculus ) this provide nourishment to Osteocytes cells.