Lamellae found lying between osteons that are not part of an osteon are called ______ lamellae.

Choice A reason: Sharpey’s fibers are collagen fibers that anchor the periosteum to the underlying bone. They are structural, not part of bone marrow.

Choice B reason: Elastic tissue is found in ligaments and certain connective tissues but is not a major component of yellow bone marrow.

Choice C reason: Spongy bone surrounds the marrow cavities but is not the content of yellow marrow itself.

Choice D reason: Fat is the correct answer. Yellow bone marrow primarily consists of adipocytes and serves as an energy reserve. It replaces red marrow in many bones as a person ages.

Choice E reason: Blood-forming cells are found in red bone marrow, not yellow marrow. Red marrow is responsible for hematopoiesis.

Choice A reason: A meatus is a canal-like passageway through bone, such as the external auditory meatus. It does not describe a projection and is not involved in articulation.

Choice B reason: A fossa is a shallow depression in a bone, often serving as a site for muscle attachment or articulation. However, it is not a projection but rather a concavity.

Choice C reason: An epicondyle is a raised area on or above a condyle, typically serving as a site for muscle attachment. While it is a projection, it is not the rounded articular type described in the question.

Choice D reason: A condyle is a rounded articular projection that typically forms part of a joint. It allows for smooth articulation with another bone and is the correct term for the structure described.

Choice E reason: A foramen is a hole or opening in a bone that allows the passage of nerves and blood vessels. It is not a projection and does not serve an articulating function.