Lab 8 Skeletal System Flashcards
how many bones in ribs
24
how many bones in vertebrae
26
how many bones in skull
28
immovable joint
has fibrous connective tissue joining the bone
slightly moveable joint
has fibrous joints OR cartilaginous with articular cartilage joining the bones
freely moveable joints
have a membrane and articular cartilege
- synovial
Flexion
bending parts at a joint so that the angle between them decreases and the parts come closer together (bending the lower limb at the knee)
Extension
straightening parts at a joint so that the angle between them increases and the parts move far- ther apart (straightening the lower limb at the knee)
Hyperextension
excess extension of parts at a joint, beyond the anatomical position (bending the head back beyond the upright position)
Abduction
moving a part away from the midline (lifting the upper limb horizontally to form a right angle with the side of the body)
Adduction
moving a part toward the midline (return- ing the upper limb from the horizontal position to the side of the body)
Rotation
moving a part around an axis (twisting the head from side to side). Medial rotation involves movement toward the midline, whereas lateral rota- tion involves movement in the opposite direction.
Circumduction
moving a part so that its end follows a circular path (moving the finger in a circular motion without moving the hand)
Supination
turning the hand so the palm is upward or facing anteriorly (in anatomical position)
Pronation
turning the hand so the palm is downward or facing posteriorly (in anatomical position)
Eversion
turning the foot so the sole faces laterally
Inversion
turning the foot so the sole faces medially
Protraction
moving a part forward (thrusting the chin forward)
Retraction
moving a part backward (pulling the chin backward)
Elevation
raising a part (shrugging the shoulders)
Depression
lowering a part (drooping the shoulders)
Depression
lowering a part (drooping the shoulders)
ball and socket joint
hips
hinge joint
movement in only one plane
gliding joint
sliding on surfaces
combination joint
can rotate or go side to side (different types of movement)
bone is made by
osteoblasts
- secrete collagen fibers
mature bone cells
osteocytes
bone is broken down by
osteoclasts
- aid in bone reabsorption and turnover
look at the skeleton
please
purpose of bone
movement, protection, site of blood cell production, mineral storage
basic structural unit
osteon
osteon structure
center is the Haversian canal. has different veins and arteries
- lamella surround it
- have osteocytes
- cannaliculi connects everything
moveable joint types
ball and socket, hinge, gliding, combination
aXIAL
SKULL, VERTEBRAE, RIBS
appendicular
arm, shoulder, leg
LOOK AT POWERPOINT OF SKULL
please see slide
skull
has cranium and facial bones
cranium
Frontal Parietal (2) Temporal (2) Occipital Sphenoid Ethmoid
facial bones
Nasal Vomer Zygomatic Maxilla Mandibular
see skeleton for vertebral column
note which are fused together!! see ppt!
Cervical column
have holes (foramen) for the vertebral arteries going into the brain
7
thoracic column
articulate with the ribs (protect thoracic and abdominal organs)
12
lumbar
thicker to bear weight of the body
5
sacral
fused to form dorsal aspect of hips and triangular to distribute weight to the legs
5
coccyx
remnant of the post anal tail
4
make sure you know how to identify broken away bones
disarticulated”
radius is
rad thumbs up
pelvic girdle
Coxal Bone:
Illium (rest your hands on it)
Ischium (sit on it)
Pubic
bones and bones
ligaments
bones and muscles
tendons