anthro 105 - lab practical four

which three bones fuse to become the os coxa?

ilium, ischium, and pubis

what is the name of the lateally facing socket on the os coxa?

acetabulum

how does a rigid midfoot aid in locomotion?

stabilizes foot bones

describe what a hominin femur would look like

intermediate between human and chimpanzee

which feature is on the anterior side of the tibia?

anterior crest

what feature of the os coxa articulates with the femur, and using anatomical directions, where on the os coxa is it located?

acetabulum; on the lateral aspect

how do the femoral neck and the greater trochanter difer in quadrupeds and bipeds?

bipeds have a longer femoral neck and smaller greater trochanter, while quadrupeds have a shorter femoral neck and larger greater trochanter

what is the ridge-like feature on the femur called? where is it located?

linea aspera; posterior surface

true or false: humans have a midtarsal break

false: chimpanzees have a midtarsal break

what feature of the femur is located proximally-medially?

femoral head

what features can be used to estimate sex?

curvature of the sacrum, greater sciatic notch, subpubic arch, and ischial spine

name two ways to distinguish a biped and quadrupedal os coxa:

quadrupeds have a longer os coxa and narrow ilium and sacrum, while humans have a short, wide os coxa and a broad ilium and sacrum

the slanting of the femur is called _______. human femora are ______ while chimpanzee femora are ________

bicondylar angle; slanted; non-slanted