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chapter 4

connective tissue

TermDefinition
Connective tissue binds structures together, provides support and protection, fills spaces, produces blood cells, and stores fat.
Fibrous connective tissue has 3 subtypes: loose, dense and reticular.
Loose (areolar) connective tissue Binds tissues and organs together Cells of this tissue are mainly fibroblasts Contains many collagen and elastin fibers in a fine web like arrangement
Fibroblasts a cell in connective tissue which produces collagen and other fibers.
Adipose tissue is a type of loose connective tissue in which the cells enlarge and store fat for energy
Loose (areolar) connective tissue - location Between tissues and organs
Loose (areolar) connective tissue - function Binds tissues and organs together
Adipose tissue - location Under skin, around organs
Adipose tissue - function Protects and cushions organs Source of stored energy
Dense Connective Tissue Has thick bundles of collagen fibers
Dense regular connective tissue has parallel fiber bundles;
Tendons Connecting muscles to bones
Ligaments Bones to bones
Aponeuroses Muscles to muscles
Dense irregular connective tissue has bundles that run in different directions; found in the dermis and joint capsules
Dense irregular connective tissue - location Tendons, Ligaments, and Aponeuroses
Dense irregular connective tissue - Function Binds organs together
Dense irregular connective tissue - location Dermis of skin and joint capsules
Dense irregular connective tissue - function Prevents organ overexpansion (Urinary bladder) Provides strength and resistance to stretching
Reticular connective tissue The fibroblasts are called reticular cells The matrix contains only reticular fibers Also called lymphatic tissue; part of the immune system
Reticular connective tissue Found in lymph nodes, spleen, thymus and red bone marrow
Chondrocytes Cartilage Cells
Lacunae Chondrocytes chambers
Chondroblasts Produce Cartilage tissue
Hyaline cartilage Most common type Contains only fine collagen fibers Found in the nose, ends of long bones and ribs, in the supporting rings of the trachea, and the embryonic skeleton
Hyaline cartilage location Nose, rib cartilages, trachea, fetal skeleton,
Hyaline cartilage function Structural Support Framework for fetal Skeleton
Elastic Cartilage location Ear and epiglottis
Elastic Cartilage function Structural Support
Fibrocartilage location Discs between vertebrae, anterior joint between hip bones
Fibrocartilage function Strong structural support, shock absorver
Elastic Cartilage Matrix contains many elastic fibers in addition to collagen fibers; more flexible than hyaline cartilage
Fibrocartilage Matrix contains strong collagen fibers Absorbs shock
Bone made of extremely hard matrix composed of mineral salts deposited around collagen fibers.
Osteoblasts and Osteocytes Bone cells
osteoblasts produce the organic part of bone
Compact bone Contain osteons, or Haversian systems – consist of lamellae surrounding central canals Osteocytes lie in lacunae, which have canaliculi radiating out from them
Spongy Bone Contain trabeculae and bone marrow
Blood Composed of formed cell elements and plasma
Red Blood Cells erythrocytes Carry Oxygen
White Blood Cells leukocytes Fight infection
Platelets thrombocytes Blood Clotting
megakaryocytes fragments of thrombocytes cells
Created by: JamieS1982
 

 



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