Lecture 2/3 Flashcards
What is the primary difference b/w CT and epithelial tissue?
CT has few cells and a lot of matrix
Epithelial tissue has a lot of cells, & little matrix
What are the 4 adult CT?
Elastic
Reticular
Loose
Dense
What are the special CT?
Adipose
Cartilage
Bone
Hematopoietic
Reticular characteristics?
Network of fibers with cells packed in
What are the characteristics of loose (areolar) CT
High ratio of fibroblasts to fibers
Type 1 collagen
below epithelial tissue of most organs
What are the characteristics of dense (white fibrous) CT?
High ratio of fibers to fibroblasts
-thicker bundles of collagen separated by single layers of fibroblasts
What gives multilocular fat the brown color?
High concentration of mitochondria
What is the ground substance mostly composed of?
GAGs
Gylcoproteins
What is the central canal & Haversian canal of compact bone?
Central = medullary Haversian = blood supply
What are the major bone types?
Long, short, flat, irregular, sesamoid
Cellular structure of bone
- ends = epiphysis
- shaft = diaphysis
- periosteum = surrounding bone - outer fibrous CT
- endosteum = lines marrow cavity
- articular cartilage = @ ends of joints
Appositional growth
Periosteum lays down layers of compact bone on top of spongy bone
- bones that form walls of cavities- cranial vault
- can grow in both thickness & diameter
What are the 3 joint types?
Describe & give examples
1) Cartilaginous (amphiarthrosis)
-symphosis = fibrocartilage
-synchondrosis = hyaline
Ex) pupic symphysis
2) Fibrous (synarthrosis) joined via collagenous or elastic fibers
- suture = syntosis joint
- gomphosis = peg in socket (teeth in gum)
- sydesmosis = interosseous membrane
3)Synovial (diarthroses)
-cavity
-capsule =outer fibrous —>innervated & inner synovial ->vascularized
-ligaments
-sharpey’s fibers
Ex) condyloid = synovial joint
What are the biaxial joint?
Condyloid
Saddle
2 planes, 2 axes
Permits ab/adduction & ext/flexion
Triaxial joints?
Ball & socket
Ext/flexion, abd/adduction, circumduction
