Lab #5: Mammal Bones - Forelimb

Question 1

Mammalian forelimb includes: ()

Answer 1

1) Scapula
2) Humerus
3) Radius
4) Ulna
5) Metacarpal

Question 2

Scapula: main function

Answer 2

Major site of muscle attachment
= shoulder blade

Question 3

The Scapula forms the …, which articulates with the ….

Answer 3

glenoid cavity, humerus

Question 4

Humerus connects PROXIMALLY to the … and DISTALLY to …

Answer 4

scapula; radius/ulna

Question 5

Humerus = shaped by …

Answer 5

the degree of limb mobility and by how the animal moves in space

Question 6

Radius/Ulna: in which animals is it fused?

Answer 6

Running animals (caribou/dog) = fused or partially fused or closely aligned (to promote stability
Marine animals (seal) = flattened and widened to support swimming

Question 7

Metacarpals in artiodactyls

Answer 7

fused into a singular bone = CANNON bone (6 petites trochlea) for high impact terrestrial locomotion

Question 8

The metacarpal articulates PROXIMALLY with …. and DISTALLY with the …

Answer 8

several CARPALS, phalanges