Connective Tissues Flashcards
Collagen Fibers (White Fibers)
one of the strongest proteins made by the body; fibroblasts make them by protein synthesis; need Vitamin C and Cu to be strong
Reticular Fibers
tiny collagen fibers; look like spider webs holding tissues together; secreted by fibroblasts
Elastic Fibers (Yellow Fibers)
return to original position after being pulled or stretched unlike collagen fibers
Adipose Tissue
loose CT designed to store fat; found beneath skin, around joints, pads kidneys and other eternal organs
Bone Tissue
Osteocytes (bone cells) lie in lacunae and arranged in concentric circles
Cartilage
ridged CT providing supportive framework; lacks a vascular system causing slow healing times
Loose CT
thin membranes binding body parts together
Loose Areolar CT
contains fibroblast, collagen fibers, capillaries, mast cells, WBCs, Reticular fibers, and a matrix
Fibroblast
cells that create tissue (collagen)
Capillaries
the more room in the matrix = more blood vessels found
Mast Cells
type of WBC commonly found in CT; releases histamine or heparin
Matrix or IF
fluid filled space between cells
Blood
Characteristics -matrix is filled with fluid (plasma) -fibers are used for clotting -fibers stay inactive form and are activated when clotting is needed -more matrix than cells -made in red bone marrow by hemocytoblasts -contains erythrocytes(RBC), leucocytes(WBC), thrombocytes (platelets)
Adipose Tissue CT Proper
very vascular; rule breaker: has cellularity
Loose Reticular CT Proper
makes up framework of nonhallow organs (spleen, liver, lymph nodes); very vascular to filter lymph
Dense Irregular CT Proper
packed with fibers = less room for blood vessels (slow healing); strength in ALL directions Location: -periosteum, perichondrium, parinysium, epimysium, -blood vessels -GI tract
Periosteum
around bone
Perichondrium
around cartilage
Epimysium and Perimysium
around muscle tissue
Dense Regular CT Proper
not many blood vessels; strength in ONE direction Location: -tendons -ligaments -fiberous membranes
Dense Elastic CT Proper
can form elastic ligaments that allow movement of vertebrae Location: -under transitional epithelium -walls of respiratory pathways -walls of blood vessels
Cartilage CT
firm matrix due to peptidoglycan; avascular; cells (chondrocytes) must live in lacunae; no room for nerves
Lacunae
pools that hold cells
Hyaline Cartilage
toughest cartilage; wear/tear; white = loaded with collagen fibers Location: -ends of joints -nose -trachea -connects ribs to sternum
