Biology II - Bone Basics: Girdles

Biology II

what are the girdles

a ring of bones that attaches appendages to the axial skeleton

part of the appendicular skeleton

pectoral girdle

also known as the shoulder girdle (includes the clavicle and the scapulae)

attachment of upper limbs (arms) to the axial skeleton

high degree of mobility, little stability

what 2 bones are apart of the pectoral girdle

clavicle and scapula

clavicle

the collarbone

most commonly broken bone

s-shaped

runs from sternum to scapula

scapula

the shoulder blade

articulates with the humerus and the clavicles

no attachments to vertebral column which leads to maximum mobility

many muscles attached to it

pelvic girdle

hip girdle (includes the hip bones and sacrum)

attachment of lower limbs to the axial skeleton

supports and protects the internal organs of the pelvis

high degree of stability, little mobility

extremely different in males and females

bones of the pelvis

sacrum, ilium, pubis, ischium, acetabulum

hip bones

coxal bones

attached to the sacrum

each made of 3 parts

ilium

the flare of the hip bone

pubis

the pubic bone

joined in the middle by a fibrocatilage disk called the pubic symphysis

ischium

the part you sit on

acetabulum

where the femur articulates