Skeletal system Flashcards
1
Q
Functional roles of axial skeleton
A
- supports internal organs
- skull houses sensory organs
- vetebral column provides extensive attachment for muscles moving the head, neck, trunk and limbs
- thoracic cage performss movements during respiration
2
Q
vertebral column
A
7 cervical vertebrae 12 thoracic vertebrae 5 lumbar vertebrae 5 sacral vertebrae 4 coccygeal vertebrae
3
Q
functional roles of appendicular skeleton
A
- control over environment (grasping objects)
- change in body position in space
- provides mobility
4
Q
functional roles of skeletal system
A
- support of body
- protection of internal organs
- levers for skeletal muscles to act
- production of blood cells through bone marrow
- storage of minerals
5
Q
2 types of bone material
A
- organic
- organic
6
Q
layers of long bone (superficial>)
A
- periostium
- compact bone
- endosteum
- spongy bone
- medullary cavity
7
Q
Two types of marrow in medullary cavity
A
- yellow marrow : fat
- red marrow : blood cells
8
Q
4 types of bone cells
A
- osteoblasts
- osteoclasts
- osteocytes
- osteoprogenitor
9
Q
intramembranous ossification
A
- cranial bones, mandible and clavicle
- osteoblasts form ossification center, then osteocytes with the help of blood vessels that make adult bone with spongy/compact bone
10
Q
endochondral ossification
A
- limb bones
- primary ossification center (diaphysis)
- secondary ossification center (epiphyses)
- growth plates (metaphyses)
