Skeletal System Flashcards
Membrane that surrounds the cartilage and has a blood supply
Perichondrium
Most abundant skeletal cartilage
Hyaline cartilage
Cartilage located at the ends of long bones
Articular cartilage
Cartilage that holds ribs to the sternum
Costal cartilage
Cartilage found in the trachia
Respiratory cartilage
Cartilage found at the tip of the nose
Nasal cartilage
Cartilage found in the outer ear
Elastic cartilage
Cartilage that is strong and found in areas where there is a lot of compression, pressure, or stress
Fibrocartilage
Cartilage that sits right on the tibia
Meniscus of the knee
Cartilage that sits between vertebrae
intervertebral discs
Cartilage found in the hips
pubic symphysis
Type of bone that has a shaft and two ends
Long bones
Type of bone that looks like pebbles and cubed; found in the tarsal and carpal
Short bones
Type of bone that grows within a tendon; patella, carpal area, tarsal
Sesamoid bones
Type of bone that is flat and usually curved; skull and sternum
Flat bones
Type of bone that makes up the vertebrae
Irregular bones
Where does blood cell formation take place?
within the bone marrow
Type of minerals stored in bones
calcium and phosphate
What are the functions of bone?
Support Protection Movement Mineral storage Blood cell formation
Shaft of the bone
Diaphysis
Ends of the long bone
Epiphyses
Found at the end of the long bone, acts as a cushion
Articular cartilage
Growth plate; where the long bone grows in length and consists of all hyaline cartilage
Epiphyseal plate
Growth plate after it turns into bone
Epiphyseal plate
Membrane that surrounds the bone, holds muscle to bone; has a great blood supply, nerve fibers, and lymphatic vessels
Periosteum
Cell that produces bone material
Osteoblasts
Cell that breaks down bone
Osteoclasts
Membrane that lines the marrow cavity, covers most of spongy bone
Endosteum
Type of bone that has a bunch of holes and plates of bone
Spongy bone
Plates of bone
Trabeculae
Structural unit of compact bone
Osteon (Haversian system)
Rings around the central canal
Lamella
Where blood vessels and nerves are
Central (Haversian) canal
Run at a right angle to the central canal and connects the osteons
Perforating canals (Volkman’s)
Contains the osteocytes
Lacunae
Small canal within the bone that carries blood to the osteocytes
Canaliculi
Bone formation
Osteogenesis
When bone starts to form
Embryos
When does bone growth occur?
Early adulthood (puberty)
Bone formation within a membrane such as in the clavicle and skull bones
Intramembranous ossification
Two places where hyaline cartilage remains:
Articular cartilage
epiphyseal plates
How often and what percent of our bone mass do we recycle?
Every week, 5-7%
How often is spongy bone replaced?
3-4 years
How often is compact bone replaced?
every 10 years or so
This part of the bone is replaced every 5-6 months whereas the shaft is replaced much more slowly
Distal part of the femur
This type of break is when the ends of the bone remain in alignment
Nondisplaced fractures
This type of break is when the end of bones are out of alignment
Displaced fracture
This type of break in the bone is when the bone is broken completely through
Complete fracture
This type of break in the bone is when it has not broken through
Incomplete fracture
i.e stress fracture
This type of break in bone is when it breaks through the skin
Compound fracture
This type of break in the bone is when the skin has not been broken
Simple fracture
This type of break in the bone is when the doc can replace with hands
Closed reduction
This requires surgery to fix the broken bone
Open reduction
Type of procedure where the screws are placed on the inside of the skin
Open Reduction Internal Fixation
Type of procedure where the screws are placed on the outside of the skin
Open Reduction External Fixation
Pooling of blood
Hematoma
What are the four step in the repair process of bone?
Hematoma Formation
Fibrocartilaginous callus formation
Bony callus formation
Bone remodeling
Part of the bone repair process where the collagen fibers lay down between fractured ends
Fibrocartilaginous callus formation
Part of the bone repair process where osteoblasts lay down bone material
Bony callus formation
Part of the bone repair process where osteoclasts break down the excess bone material and form the marrow cavity
Bone remodeling
Abnormal softening of the bone
Osteomalacia
In children: the abnormal softening of the bone
Rickets
What is the activity of the osteoclasts and osteoblasts in osteoporosis?
Increased activity of osteoclasts, decreased activity of osteoblasts
Most common place where osteoporosis occurs in the skeleton
Vertebra and the neck of femur
What hormone maintains the health and normal density of the skeleton by slowing the activity of osteoclasts and increasing the activity of osteoblasts?
Testosterone and estrogen
Contributing factors of osteoporosis
Not enough weight bearing exercise and decrease in Vitamin D that is necessary for calcium absorption
What ways can osteoporosis be prevented?
Getting enough calcium while bones are still increasing in density, drinking fluoridated water, and getting plenty of weight bearing exercise.
What is Paget’s Disease?
Too much bone formation
What is the action of osteoclasts and osteoblasts in Paget’s disease?
Decreased action of osteoclasts, increased activity of osteoblasts
Areas most involved in Paget’s disease
Spine, pelvis, femur, and skull
Statistics of Paget’s Disease
Rarely occurs before age 40 in 3% of North American elderly people. The cause is unknown