Skeleton and Joints

The scapula (shoulder blade) is part of the shoulder girdle. It is also part of the appendicular skeleton, but choice D is the more specific answer.

The lateral condyle of the femur articulates with the lateral facet of the superior articular surface of the tibia, in the knee joint.

Lacunae are the spaces within the lamellae of an osteon which enclose a bone cell (osteocyte). These cells extend their processes into the canaliculi.

At the inferior end of the body of the sternum. The temporal bone has a mastoid and a styloid process.

Red (and/or yellow) marrow fills the medullary canal (or cavity).

Osteon and Haversian system are synonyms. A Haversian canal (central canal) is at the centre of the Haversian system.

Distal refers to the end that is further away from the trunk. Hence the ankle bone (tarsals) is the correct choice.

Also known as the central canal. The medullary canal is a macroscopic structure within the diaphysis (shaft) of a long bone.

This is a better answer than the also true choice A.

Red marrow is actively forming blood cells. Yellow marrow is inactive.