The Skeletal System

Question 1

components of the skeletal system

Answer 1

bones – 206 bones
joints – 360 joints

Question 2

skeletal system division

Answer 2

axial skeleton (80): skull, spine, ribs, sternum
appendicular skeleton (126): extend from the axial skeleton (shoulders, legs, hips, arms)

Question 3

what are joints and what are the types of joints?

Answer 3

joints are parts where two or more bones connect.

immovable joint
slightly movable joint
freely movable joint

Question 4

what are ligaments and tendons made of and how do they differ?

Answer 4

they are made of dense fibrous connective tissue.
ligaments connect bone to bone
tendons connect muscle to bone

Question 5

types of bones and examples

Answer 5

long bones: humerus, radius, ulna, femur, tibia, fibula, metacarpals, metatarsals, phalanges
short bones: carpals, tarsals
flat bones: cranial bones, sternum, ribs, scapulae
sesamoid bones: patella
irregular bones: vertebrae, sacrum

Question 6

bone layers

Answer 6

periosteum
endosteum
compact bone/cortical bone
spongy bone
bone marrow/medullary cavity

Question 7

what are the types of bone marrow and their function

Answer 7

red marrow: produces blood cells
yellow marrow: stores fat (energy source)

Question 8

types of bone cells

Answer 8

osteoblasts
osteocytes
osteoclast
osteogenic cells