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Bone Tissue

A&P Chapter 6 Dr.Cutler

What is the Skeletal System? Framework of bones, cartilages, ligaments
What is Osteology? Study of bone structure and treatment of bone disorders
What are the functions of the Skeletal System? Support, Protection, Movement, Mineral Homeostasis, Hemopoiesis, Storage of Fat
What are the 7 Bone Structures? Epiphysis, Metaphysis (growth plate), Diaphysis, Articular Cartilage, Periosteum, Medullary Cavity, Endosteum
What is the epiphysis? Either end of a long bone
What is the metaphysis? The Diaphysis and Epiphysis meeting point (growth plate)
What is the diaphysis? The Shaft/body of a long bone
What is the Articular Cartilage? Hyaline cartilage covering epiphyses (reduces friction)
What is the Periosteum? Tough CT covering outside of bone (Sharpey's perforating fibers)
What is the Medullary Cavity? Cavity containing fat/yellow marrow and blood vessels. Makes bones lighter
What is the Endosteum? Membranous inner lining of medullary cavity
Where are the mineral salts deposited into? Deposited in extracellular matrix
What is Calcification? Hardness of bone
What helps with flexibility of the bones? Collagen Fibers
What do Osteoclasts do? Breaks bone down to release minerals
What are the 3 Types of Bone Cells? Osteoblasts, Osteocytes, Osteoclasts
What kind of cells are Osteoblasts? Young, immature cells
What kind of cells are Osteocytes? Matue bone cells, hardens bone
What do Osteoclasts do? Breaks bone down to release calcium
What is a Compact Bone? Dense along diaphysis, thin at epiphysis. Protects and supports. (outer layer of bone)
What kind of bone makes up 80% of skeleton, contains Osteon, Central Canal and concentric lamellae ? Compact (Cortical) Bone
What are lacunae? "Little Lakes" for osteocytes
What are canaliculi? "Small Channels"; Osteocytes breathe/eat/connect
What is a Spongy Bone? Lightweight and provides tissue support (inside of bone)
What makes up 20% of skeleton, NO Osteon, Inside Bone? Spongy (Trabecular) Bone
What are trabeculae? "Little Beams"; Contains red and yellow marrow
What are Epiphyseal Lines? Where the Long Bone stops growing (after puberty)
What are the phases of Bone Repair during a fracture? Reactive, Reparative, Remodeling (Fear, Fix, Finish)
What are the types of Fractures? Open, Comminuted, Greenstick, Impacted, Potts, and Colles
What does calcium homeostasis do? Calcium Regulation
What does Calcitonin do? Puts the bone in
What does PTH do? Takes the bone out
What is Osteopenia? Thinner and weaker bones, between ages 30-40
What is Osteoporosis? Severe bone loss
What is a Fossa? Shallow, depression
What is a Condyle? Rounded projection
What is an Epicondyle? Raised area above a condyle
What is a Head? Bony expansion on a narrow neck
What is a Trochanter? Large, blunt and irregular surface
What is a Tuberosity? Rounded projection
What is a Process? Any bony prominence
What is a Crest? Narrow, prominent ridge of bone
What is a Line? Narrow ridge of bone
What is a Fovea? Small pit like indent
What is a Tubercle? Small rounded projection
What is a Ramus? Arm like bar of bone
What is a Spine? Sharp, slender projection
What is a Foramen? Round or oval opening through a bone
What is a Fissure? Narrow, slitlike opening
What is a Meatus? Canal-like passageway
What is a Sinus? Space within a bone
Created by: delainaxrepola



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