human evolution Flashcards
5 traits of Mammals
mammary glands (produce milk)
fur/ hair
3 bones in middle ear
lowe jaw bone
variety in teeth size
primates body features
prehensible hand with 5 digits and opposal digit (thumb)
lots of sensory glands
flexible spine
hips & shoulders with lots of rotation
Primates skull features
large cranium to body size
3D coloured … and forward facing eyes
Primate functions
social creatures
Hominoids
great apes, humans, lesser apes
Hominoid features for sitting up right
short spine between rib & pelvis
no tail
broad ribs & pelvis
larger arms then legs (not humans)
further back soulder blades
destinctive moler teeth
increased cranium size
Hominins
can walk upright for long periods of time
Traits of Hominins
smaller canine teeth
parabolic dental arch
foramen magnum more central
less prominent brow ridge
S spine not C
ribcage differs
short hands straight fingers
shallow pelvis
big toe in line with others
wide heal + arches
Hominins intelligence
social and increase cognitive ability