Chapter 6 Skeletal System Flashcards
Yellow Bone Marrow
Stores Fat
Long
Longer then wide
Femur
Functions of Skeletal System
- Support
- Movement
- Protection
- Hem
- Storage
Flat
Thin
Rib
Short
Cubic Shaped
Carpals
Irregular
Complex Shape
Vertebrae
Sesamoid
Enclosed by a tendon
Patella
Structural Bone
Small bones located within cranial structures (Joint)
Ephipeseal Plate
Area of cartilage were bones grow in length
Articular Cartilage
A layer of cartilage covering epiphyses to reduce friction in joints
Periosteum
Tough outer covering around bone
Diaphysis
Long Shaft
Medullary Cavity
Hollow inside of the bone
Osteogenic Cell
Unspecialized cells which undergo mitosis to become osteoblasts
Osteoblasts
Bone building cells
Osteocytes
Bone cells which maintain bone tissue
Osteoclasts
Bone destroying cells
Compact Bone
Makes up the shaft of all long bones
Osteon
Basic unit of compact bone
Haverisan
Contains blood vessels and nerves
Lamella
Concentric rings of matrix
Lacunae
Spaces with contain osteocytes
Canaliculi
Canals that link osteocytes to haversian canal
Spongy Bone
Contains red bone marrow and makes up the end of long bone
Red Bone Marrow
Produces Blood Cells
Bone Formation
Ossification
- Initially in embryo and fetus
- Growth
- Remodeling
- Repair of fractures
Intamembraneous
Bone forms directly in mesenchyme layer (Membrane Like)
Endocranial
Forms with hyaline cartilage developed from mesenchyme
Endocranial Ossification
- Spongy bone is formed
2. Secondary center is deveopled
Length
Chondrocytes in the epiphyseal plate divide and increase cartilage layer
Fontanels
Area of fibrous connective tissue in infant skulls that are replaced by bones
Structures
Immovable joint between the cranial bone in adult
Sinuses
Air spaces in cranial bones, lined with mucous membrane
Sesamoid Bone
Bones that are connected with tissue
Trabeculae
Lattice of bone with spaces between that contain red bone marrow
Classification
Cells become osteocytes
Primary ossification center
the first area of the bone to start ossifying
Secondary ossification center
Area of ossification that appears after the primary ossification center has already appeared
Remodeling
Resorption by osteoclasts and deposition by osteoblasts
Osteoporosis
A decrease in bone mass which increases the risk of fractures
Fracture
Trama to bone Tissue
Axial Skeleton
Protection
Skull, sternum, rib, vertebrae
Appendicular Skeleton
Movement
Arms, Shoulders, legs, hips
Male Pelvis
Heavier
Pubic arch less then 90 degrees
Female pelvis
Wider and shallower
Pubic arch larger than 90 degree
Female give birth
Female Pelvis
Wider and shallower
Pubic arch more the 90 degree
Female give birth
Risk Factors for osteoporosis
Pettie Women after menopause Lack of exercise Use of cigarette and alcohol Family history poor diet
Prevent for osteoporosis
Plenty of calcium vitamin D Weight-bearing exercise avoiding cigarette and alcohol Estrogen replacement therapy/ other drugs
Endosteum
Membrane which lines marrow cavity
Osteporosis
A decrease in bone mass which increases the risk of fractures
Steps for healing a fracture
- Inflammatory stage
- Reparative Stage
- Remodeling stage
Support
Structural framework for body
Movement
Attachment site for muscles
Protection
Protects internal organs
Hem
Red bone marrow produces blood cells
Storage
Stores calcium, phosphorus, and fat
Osteomalacia
New bone formed during remodeling fails to clarify
Osteomyelitis
Baterial infection of the bone
Osteogenic sarcoma
Bone cancer
Joint
A point of contact between two bones, cartilage and bones or between teeth and bones
Fibrous
Bones held together by fibrous connective tissue
Cartilaginous
Bones held together by cartilage
Synovial
have a synovial cavity
Synarthrosis
An immoveable joint
Skull structure
Amohiarhrosis
Slightly moveable joint
Pubic Symphsis
Diathrosis
The freely movable joint has a synovial cavity
Knee
Fibrous Capsule
Strong flexible layer that attaches to the periosteum
Synovial Membrane
Secretes synovial fluid which reduces friction
Accessory ligaments
Help connect bone to bone
Meniscus
Splits joint cavity into 2 separate areas, helps maintain joint stability
Bursa
A sac of synovial fluid located at the friction points in a joint
Arthroscopy
Surgical examination of joint
Arthroplasty
Joint replacement
Planar Joint
Found between small bones with flat surfaces
Side to side and back to forth movement
Carpals
Hinge Joint
Convex surfaces of one bone fitting into the concave surface of 2nd bone
back and forth movement
elbow
Pivot Joint
Round/ pointed surface of a bone fits in-ring formed by 2nd bone
Movement- Rotation
Atlas- axis joint
Condyloid Joint
Oval Shaped
Movement up and down and side to side
Wrist
Saddle Joint
Bone surface at joint is saddled shaped
Movement is side to side or up and down
Thumb
Ball and Socket Joint
The ball surface of one bone fits into a cuplike depression of 2nd bone
Permits the most movement
Circumduction
Shoulder
Arthritis
An inflammation of the joints which cause pain and stiffness
Osteoarthritis
The articular cartilage on the ends of the bones break down which results in bone rubbing against bone
Gout
Build up of uric acid in the blood, gets deposited in joints
Rheumatoid Arthritis
Autoimmune disease in which the immune system attacks and destroys the cartilage in joints
Bursitis
Inflammation of a bursa
Dislocation
Bone is displaced out of joint cavity
Sprain
Twisting joint that stretches or tears ligament
Adduction
Movement away from the midline
Abduction
Movement towards the midline
Dorsiflexion
Flexing the foot
Plantar Flexion
Pointing the foot
Extension
Increasing the angle
Hyperextension
Extending the joint beyond atomical position
Flexion
Decreasing joint angle
Rotation
Movement in a circular motion
Circumduction
Movement of the joint in a circular motion
Supination
Palm facing up
Pronation
Palm facing down
Eversion
Turning sole outwards
Inversion
Turning sole inwards
Protraction
Jut foward
Retraction
Draw back
Elevation
Raise up
Depression
Downward Movement