The haversian canal contains the bone's blood supplies. The central haversian canal, and horizontal canals (perforating/ volkmann’s) canals contain blood vessels and nerves from the periosteum. Prior to sectioning and staining, this sample was soaked in a weak acid solution thus dissolving the mineralized component of the bone matrix but leaving behind all of the organic components (mostly type i collagen).
Microscopic structure of human lamellar bone. 35
The lamellae of the haversian systems are created by osteoblasts.
The tunica adventitia contains connective tissue, a few cells, macrophages, mast cells, fibroblasts, and the nerves and vessels that supply the vascular wall.
Volkmann's canals may be seen connecting haversian canals. The histology is reproducible on each occasion. The drawings of histology images were originally designed to complement the histology component of the first year medical course run prior to 2004. Histology of cartilage and bone bio 210 3 bone/osseous tissue (note the presence of lacunae, which readily distinguish the supporting connective tissues from connective tissue proper.
Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal.
Dense /compact bone mhs 202 figs. As these cells secrete matrix, they become trapped in spaces called lacunae and become known as osteocytes. Compact bone histology from the compact bone histology slide, i will enlist some important histological features that you might identify at the laboratory.first, you should find out these features or structures from the bone slide pictures. In an ordinary microscopic section, viewed by transmitted light, they appear as fusiform opaque spots.
•interstitial lamellae •circumferential lamellae •endosteal lamellae •volkmann's canals.
The tunica media is composed of smooth muscle cells, elastic lamellae including the external elastic lamina and collagen fibers. The lamellae are concentrically located around a central canal (haversian canal) which contained blood vessels, nerves, and loose connective tissue. Representative sections of gill lamellae stained with pas with hh nuclear counterstain. The pressure produced by the recoil of the lamellae facilitates the uniform movement of the blood.
Bone, haversian system, lacunae, matrix, collagen type i, inner circumferential lamellae, outer circumferential lamellae, volkmanns canals, lamellae, osteocytes.
The lacunae are situated between the lamellae, and consist of a number of oblong spaces. Metastasis is the process by which cancer cells spread throughout the body and initiate tumors in various organs. Learning objectives histological organisation of bone bone cells and matrix formation of bone. Lamellae can be mainly divided as homogenous lamellae or striated lamellae.
Slide 50 (fibula, monkey, decalcified, h&e) view virtual slide.
Osteocytes communicate with the haversian canal through cytoplasmic extensions that run through canaliculi, small interconnecting canals. These labelled diagrams should closely follow the current science courses in histology, anatomy and Interstitial lamellae lie adjacent to the complete haversian system that filled in the resorption canal. Each lacuna is occupied during life by a.
400x image credit this image is of a slide from the virtual histology laaboratory.
Using c to denote the number of cells lodged in. I) an elongated oc with several lamellae, ii) an an at the ventral tip of the upper lip, iii) a pn at the palate of the oral cavity, iv) a moo with longitudinal lamellae, v) lamellae consisting of. The lamellae labelled in this picture are the inner circumferential lamellae as they are around the marrow cavity. Based on morphological and histological study, the olfactory organs of the two lungfish species revealed the following primitive characteristics:
Dgking@siu.edu siuc / school of medicine / anatomy / david king
Even though this section is distorted, you should be able to find osteons in various stages of. The boundary of an osteon is the cement line. These sections may contain the primitive and the mature osteon or haversian systems with concentric lamellae. The striated lamellae are a result of the passage of little tissue bridges which lie between the homogenous lamellae distributed in the bone matrix.
This sometimes happens via the bloodstream, where cancer cells become lodged in capillaries of organs and then move across the capillary wall into the organ.
Download scientific diagram | histology of gills. The intervening epidermis between the two cornoid lamellae may be thinned and show a prominent lichenoid or superficial perivascular lymphocytic infiltrate. These elastic lamellae absorb the pressure generated by the contraction of the ventricles of the heart. Again, inferior to the periosteum, the bony trabeculae may join with a thin layer of compact bone in a different section.
3.18 & 5.1 osteon lacuna(e) central (haversian) canal perforating canal (partially visible) concentric (haversian) lamellae canaliculi interstitial.
The osteocytes are arranged in concentric rings of bone matrix called lamellae (little plates), and their processes run in interconnecting canaliculi. In histology, a lacuna is a small space, containing an osteocyte in bone, or chondrocyte in cartilage. The other lamellae of compact bone are organized into inner circumferential, outer circumferential, and interstitial lamellae. This photo shows a cross section through bone.
These two types of lamellae are observed in the longitudinal and the transverse sections of the bone.
They are sketches from selected slides used in class from the teaching slide set. Histology of compact bone showing osteon. At higher magnification, the tunica media of a large, elastic artery demonstrates the wavy, elastic lamellae.
