Final answer:
Articular cartilage is the smooth, rounded landmark at the articular ends of bones, facilitating movement and providing a low-friction surface in joints. Bone surface features include articulations and projections that vary based on their specific function and location.
Step-by-step explanation:
The landmarks that are smooth, rounded, and located at the articular ends of bones are covered by articular cartilage. This cartilage is essential as it provides a low-friction, wear-resistant surface in the joints, allowing for smooth movement between bones.
The articular cartilage also serves to absorb shock and reduce the stress on the underlying bone during weight-bearing activities.
Bones have surface features that vary based on their function and location within the body, such as articulations, projections, and holes. Articulations are where two bone surfaces meet, often with one surface being rounded to fit into a more concave counterpart.
Meanwhile, projections are areas that extend above the bone surface and serve as attachment points for tendons and ligaments. The ends of long bones, where articular cartilage is found, typically articulate with other bones to form joints, facilitating movement and bearing the physical demands placed on the skeletal system.