Animal Science General Biology
Specialized Connective Tissue
They include :- 1- Skeletal (Supporting) Connective Tissue
2- Fluid (Vascular) Conecctive tissue
I / Skeletal Connective Tissue
Cartilage & Bone called supporting connective tissue because they provide astrong and supporting into they body , in these connective tissue , the matrix contain numerous fibers and in some cases , deposits of insoluble calcium salts.
A- Cartilage : It form the skeleton of early mammalian fetuses but it is gradually replaced in the growing by bone matrix of cartilage is firm but plaiaple . It is composed of amorphous ground substance , fibers and characteristics cells .
Cartilage is surrounding by connective tissue region called perichondrium which composed of tow distinct layer- anouter , fibrous region of dense irregular connective tissue and an inner cellular (chondrogenic) layer composed of chondorogenic cell.Chondrogenic cell , found in the inner layer of the perichondrium differentiate into chonroblasts which produce cartilage . Condrocytes (matured chondoblasts) is single or group which formed cell nests; chondrocytes is located in the cavities called lacunae .there are three type of cartilage.
1- Hyaline cartilage : the most commone form of cartilage , it is found on the ends of long bones and in the nose , trachea ,the matrix of hyaline cartilage contain collagen fibersw but because the fibers don´t stain well. They are not alaways apparent in light microscopy.
2- Elastic cartilage
Contain numerous elastic fiber . Found in external ear , epiglottis and larynx .
3- White fibro- cartilage
Found in the intervertebral discs the matrix contain collagen fibers , there is no perichondrium in this cartilage.
II / Bone
Is the main component of the skeleton in the adult human . bone is composed of a calcified matrix and contain osteogenic , osteoblasts ,osteocytes & osteoclasts . osteoblast secrete the organic matrix , osteocyte lie in cavities called lacunae
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .