UNIT 4.1 Cartilaginous Tissue PDF

OUTLINE 4.1. Cartilaginous tissue. 4.1.1. General characteristics. 4.1.2. Types. Hyaline cartilage. Elastic cartilage. Fibrocartilage. 4.1.3. Growth and repair. © Copyright Universidad Europea. Todos los derechos reservados CARTILAGE INFOGRAPHICS: types of cartilage. © Copyright Universidad Euro...

OUTLINE 4.1. Cartilaginous tissue. 4.1.1. General characteristics. 4.1.2. Types. Hyaline cartilage. Elastic cartilage. Fibrocartilage. 4.1.3. Growth and repair. © Copyright Universidad Europea. Todos los derechos reservados CARTILAGE INFOGRAPHICS: types of cartilage. © Copyright Universidad Europea. Todos los derechos reservados CARTILAGE INFOGRAPHICS: types of cartilage. HYALINE CARTILAGE BLANKET B BRONCHIAL CARTILAGE L LARYNX CARTILAGE A ARTICULAR CARTILAGE N NOSE CARTILAGE K COSTAL CARTILAGE E EMBRYONIC CARTILAGE T TRACHEAL CARTILAGE © Copyright Universidad Europea. Todos los derechos reservados ELASTIC CARTILAGE AACCEE A AURICLE A AUDITORY TUBE C CUNEIFORM C CORNICULATE CARTILAGE E EPIGLOTIS E EXTERNAL AUDITORY CANAL CARTILAGE INFOGRAPHICS: body location of cartilage. © Copyright Universidad Europea. Todos los derechos reservados HYALINE CARTILAGE • Presents perichondrium except in the articular cartilage and epiphyseal plates. • It’s the most abundant and the weakest type of cartilage. • Chondrocytes sit in spaces called lacunae. • Fine collagen fibers in a jelly-like ground substance (bluish-white, shiny). • No blood vessels or nerves, so repair is very slow. • Reduces friction at joints; flexibility and support, resilient and shock absorbing. © Copyright Universidad Europea. Todos los derechos reservados HYALINE CARTILAGE Can I recognize it? trache a 400 x https://fankhauserblog.wordpress.com/2001/10/12/cartilage-histology-lab/ © Copyright Universidad Europea. Todos los derechos reservados HYALINE CARTILAGE WHERE DO WE FIND IT? Localization: Articular (mating) surfaces of long bones. © Copyright Universidad Europea. Todos los derechos reservados HYALINE CARTILAGE WHERE DO WE FIND IT? Localization: ▪ Nose (gives shape to it). ▪ Larynx and trachea. ▪ Bronchi and bronchioles. ▪ Ventral ends of ribs (connection with sternum). ▪ Skeleton of the embryo and foetus. © Copyright Universidad Europea. Todos los derechos reservados ELASTIC CARTILAGE • Extracellular matrix: elastic fibers (elastin). • It helps to maintain the shape of organs after deformations. • It is covered by perichondrium. • Function: support (strength) and form (elasticity). • Location: ear, vocal cartilages. © Copyright Universidad Europea. Todos los derechos reservados ELASTIC CARTILAGE •Higher amount of cells when compared to the other cartilaginous tissues. •This kind of tissue does not convert into bone. Verhoeff stain © Copyright Universidad Europea. Todos los derechos reservados ELASTIC CARTILAGE Can I recognize it? https://fankhauserblog.files.w ordpress.com/2016/04/elasti c_cartilage_400x_pa112032_l bd.jpg © Copyright Universidad Europea. Todos los derechos reservados ELASTIC CARTILAGE Eustachian tube © Copyright Universidad Europea. Todos los derechos reservados FIBROCARTILAGE http://www.youtube.com/watch?v=FeJtoN7Bk8k • Multiple organized layers of collagen give this cartilage strength and allow it to absorb shock. • It does not have perichondrium (linked to dense connective tissue). • It is the strongest type of cartilage. • Function: to provide strength. © Copyright Universidad Europea. Todos los derechos reservados • Location: intervertebral discs, meniscus, temporomandibular joint. FIBROCARTILAGE Can I recognize it? Hematoxylin & eosin stain 40x © Copyright Universidad Europea. Todos los derechos reservados FIBROCARTILAGE Hematoxylin & eosin stain 40x © Copyright Universidad Europea. Todos los derechos reservados FIBROCARTILAGE © Copyright Universidad Europea. Todos los derechos reservados REVIEW TYPES OF CARTILAGE Hyaline cartilage most abundant, but weakest; has fine collagen fibers embedded in a gel-type matrix; affords flexibility and support; at joints, reduces friction and absorbs shock. Fibrocartilage contains bundles of collagen fibers in its matrix, lacks perichondrium, strongest of the three types of cartilage. Elastic cartilage contains a threadlike network of elastic fibers, perichondrium is present, provides strength and elasticity, maintains the shape of certain organs. © Copyright Universidad Europea. Todos los derechos reservados