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The diagram below represents bones at a joint found in the hind limb of a mammal.

(a) Name the bones labeled X, Y and Z
(b) (i) Name the substance found in the place labeled W
(ii) State the function of the substance named in (b)(i) above.
(c) Name the structure that joins the bone together at the joint.
(d) State the difference between ball and socket joint and the one illustrated in the diagram above
(e) Name the structure at the elbow that performs the same function as the same patella.

Answer Text:
a)- X: Femur
- Y: Tibia
- Z: Fibula
b) (i)- Synovial fluid
ii)- Acts as a lubricant hence reduces friction between bones at the joints.
- Acts as a shock absorber and distributes pressure evenly around a joint
c) - Ligament
d) - Ball and socket joint allow the movement in all planes while illustrated hinge joint allows movement in one plane only,
e)- Olecranon process