PRACTICAL ROADMAP
Cartilage and Bone T Tshabalala Hyaline cartilage
Slide 32 This slide consists of two organs, the trachea and the oesophagus. The oesophagus has a folded lumen, while the trachea is identified by the basophilically stained c-shaped ring of cartilage P IM F
F Cb IM
IM
A photomicrograph showing the structure of hyaline cartilage. Note the fibrous perichondrium (P) on the periphery containing chondroblasts (Cb) and friboblast-like cells (F). IM-Interterritorial matrix P
IM
A photomicrograph showing the general features of hyaline cartilage. Note the peripheral perichondrium (P) and the chondrocytes are arranged in isogenous groups (encircled). IM-Interterritorial matrix Cb
C
TM
A photomicrograph showing the structure of hyaline cartilage. Cb- Chondroblast, C-Nucleus of a chondrocyte, TM-Territorial matrix IM
TM
IM
IM-Interterritorial matrix, TM-Territorial matrix, Isogenous group (encircled). Fibrocartilage
Slide 79 C
A photomicrograph showing the structure of fibrocartilage. Note that the chondrocytes are dispersed among the collagen fibers (C). The chondrocytes may be found isolated or arranged in rows. C
GS GS
A photomicrograph showing the structure of fibrocartilage. The chondrocytes are housed in lacunae and arranged in rows (encircled). GS-Ground substance space, C- Collagen fibres Elastic cartilage
Slide 51 P
Cb
A photomicrograph showing the structure of elastic cartilage. Cb-Chondroblast, C-Nucleus of a chondrocyte. Note the presence of elastic fibres in the matrix. P- Perichondrium C
Elastic fibres
A photomicrograph showing the structure of elastic cartilage. C-Chondrocyte in lacuna. Cancellous bone
Slide 67 This slide is a section through the nasal cavities and air sinuses. Look for an eosinophilically stained trabecula (spicule) of spongy bone in this section. Nasal cavity
Mucosa
Bone
A photomicrograph showing a section through the nasal septum. Bone Mucosa
A photomicrograph showing a section through the nasal septum. BV Bone
A photomicrograph showing a section through the nasal septum. Note the many blood vessels (BV) in the connective tissue below the epithelium. Os
End
Os
Os-Nucleus of osteocyte, End-Endosteal lining Bone marrow cavity
Endosteum
A photomicrograph showing the structure of a spongy/cancellous bone. Encircled note the osteocytes in lacunae. Marrow cavity Lamella Endosteum
A photomicrograph showing the structure of a spongy/cancellous bone. Endosteum Periosteum
Bone marrow cavity
A photomicrograph showing the structure of a spongy/cancellous bone. Compact bone
Slide 1 and 3 P
Bone Matrix
E
A photomicrograph showing the general structure of compact bone. P-Periosteum, E-Endosteum A photomicrograph showing the structure of compact bone. Note the many roughly rounded osteons making up the bone matrix. IL
Os
HC
Canaliculi
Endosteum
A photomicrograph showing the general features of an osteon/Harvesian system. HC-Harvesian canal, IL-Interstitial lamella, Os-Osteocytes in lacunae Osteocytes in lacunae showing canaliculi, creating an spider-like appearance (arrows) VC
Note the Volkmann’s canal (VC) joining the two Harvesian systems IL
Os
HC
Os
A photomicrograph showing the general features of an osteon/Harvesian system. HC-Harvesian canal, IL-Interstitial lamella, Os-Osteocytes in lacunae Bone matrix
Sharpey’s fibers
A photomicrograph showing the general features of compact bone. Note the many Harvesian systems and the presence of Sharpey’s fibres attaching bone to the periosteum. Sharpey’s fibres
Volkman’s canal
Harvesian canal
A photomicrograph showing the general features of compact bone. Note the many Harvesian systems and the presence of Sharpey’s fibres attaching bone to the periosteum.