Organ Hist, Unit 2 - 1 Organ Histology Unit II Study Guide...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Organ Histology Unit II Study Guide Chapter 5 – Skeletal Tissue: Cartilage: functions: support weaker than bone lighter and more flexible than bone metabolically easier to maintain than bone smooth articular surface at synovial joints template for bone growth general characteristics: specialized connective tissue (has solid matrix) very rare avascular connective tissue surrounded by bi-layered membrane   perichondrium  has some healing  3 types: hyaline elastic fibrocartilage fibers collagen II collagen II perichondrium yes- usually yes no examples rings,  articular ends of bone,  ventral ends of ribs, most of larynx epiglottis, cuneiform of larynx pubic symphysis, annulus fibrosis  of IVD, major attachment of  menisci elastic cartilage has greater number of cells chondrocytes are larger in elastic cartilage less matrix in elastic cartilage components of hyaline and elastic cartilage: matrix: ground substance -- ~ 50% matrix by weight avascular – cells rely on nutrition by diffusion ground substance must have high percentage of water (65-80%) for: nutrition by diffusion slight flexibility water is maintained by hyaluronic acid (HA) [non-sulfated GAG] for softness has high affinity for water matrix supported by proteoglycan aggregate containing: [provides rigidity] chondroitin sulfate keratin sulfate heparin sulfate fibers: hyaline cartilage has collagen II fibers in the matrix elastic cartilage has both collagen II and elastic fibers
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 elastic fibers give additional flexibility but not stretch elastic fibers stain black and are parallel to the perichondrium cells: chondroblast: differentiate from: mesenchyme cells fibroblasts chondrogenic cells structural cell of cartilage exist in extended resting phases as reserve cell between periods of growth thrives in low oxygen environment     small, oval, stains very dark can not divide     chondrogenic cells: very narrow shaped cells derived from mesenchyme cells found in the chondrogenic perichondrium can differentiate into: chondroblasts (requires low oxygen) osteoprogenitor cells (requires high oxygen) can divide chondrocyte: from chondroblasts
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

Organ Hist, Unit 2 - 1 Organ Histology Unit II Study Guide...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online