The axis is the only bone listed that is not a long bone. The axis is the second cervical vertebra (C2) and is classified as an irregular bone.

The third metacarpal is the only bone listed that is not a short bone. It is a classifed as a long bone because of its shape and structure, even though it is small.

The scapula is the only bone listed that is a flat bone. The ulna is a long bone, the sphenoid is an irregular bone, and the patella is a sesamoid bone.

There are five classifications of bone in the body: long, short, flat, irregular, and sesamoid. The sternum, as well as many of the bones in the skull, are examples of flat bones.

Long bones have a greater length and diameter, while short bones have similar length and diameter measures. The femur is a long bone, while the carpals are short bones. Short bones generally appear square. Irregular bones have unique shapes, such as the sphenoid and ethmoid. Sesamoid bones are generally round and are embedded in tendon structures. The patella is a sesamoid bone.

The only bone listed that is not an irregular bone is the frontal bone. The frontal bone is a flat bone.

The only bone listed that is a sesamoid bone is the pisiform. The ethmoid is an irregular bone, the talus is a short bone, and the rib is a flat bone.

The pelvis is considered to be part of the appendicular skeleton. The sacrum, mandible, and seventh thoracic vertebra are part of the axial skeleton.

Ribs are considered flat bones. Flat bones are generally thin and flat, and can frequently be wide and/or curved. The ribs, sternum, and scapula are considered flat bones.

Long bones are classified as bones with a length that is substantially greater than their width, such as the femur, radius, and phalanges. Short bones, in contrast, have similar length and width measurements, such as the carpals and tarsals. Sesamoid bones are embedded in tendons, such as the patella. Intrasutural bones (or Wormian bones) are found between the primary bones of the skull in abnormal cases of suture formation during development.

Spongy bone is made up of a fine lattice of bone tissue, filled with cavities. Even when these cavities is filled with marrow and other tissue, allowing spongy bone to be light in weight compared to compact bone. The other three statements listed are all true.

The most prolific production sites for red blood cells are the pelvis, cranium, sternum, and vertebrae. Three out of these four sites are flat bones.