The coxal bone, also known as the pelvis, is composed of three main regions: the ilium, ischium, and pubis. The ilium is the most superior of these structures, forming the iliac crests that serve as the origin and insertion for several muscles. The ischium and pubis are inferior to the ilium and join together to form the obturator foramen, with the ischium posterior to the pubis. The acetabulum is the smooth depression, or fossa, in the hip bone where the head of the femur sits. The ilium, ischium, and pubis all come together to form the acetabulum.

The coccyx is also known as the tailbone, and is an extension of the spinal column.

Anatomical definitions determine the thigh to be the region between the knee and hip, and the leg to be the region between the knee and ankle. The thigh houses the femur, while the leg houses the tibia and fibula. The fibula articulates with the talus, one of the seven bones found in the ankle, at its distal end and the femur at its proximal end. This distal articulation is part of the ankle joint, while the proximal articulation is part of the knee joint.

The tibia is the larger bone of the two, and is responsible for carrying the majority of the weight of the lower limb.

The seven tarsal bones, including the three cuneiform bones, form the posterior of the foot immediately distal to the heel. Together with the five metatarsals and the fourteen phalanges, these twenty-six bones allow for the tremendous distribution of force necessary for bipedal locomotion. 

Moving proximal-to-distal (away from the body's core, towards the end of the foot), the order of bones is the femur (thigh), tibia (leg), tarsals (foot bones close to ankle), metatarsals (foot bones far from ankle).

A bone marrow biopsy is a procedure involving the removal of the fluid and a sample of bone from the marrow found at the center of some bones in the body. Aspiration, on the other hand, is only the removal of the fluid. The sample is acquired through a needle under anesthesia. The sample contains red blood cells, white blood cells, and platelets, which can be observed under a microscope for abnormalities in numbers and shape. The results can also be used to look for spread of infection into the bone, as well as cancer.

The most common places for obtaining a sample in an adult are flat bones, namely the sternum and pelvic girdle. In children, the femur is a first choice. It is a long bone and is a major site of hematopoiesis in individuals younger than the age of 18.

To remember the names of the tarsals, use the following mnemonic: Tiger Cubs Need MILC: Talus Calcaneus Navicular Medial Cuneiform Intermediate Cuneiform Lateral Cuneiform Cuboid. The scaphoid is carpal, all the others are a tarsals.

Each of these are features of the femur except the malleolus. That is a feature of the tibia and fibula. The linea aspera is located along the posterior surface of the femur. The femur has a medial and a lateral condyle at its distal end. The patellar surface articulates with the patella.

The correct answer is the tibia. While the distal ends of the fibula and tibia connect the knee to the ankle at the talocrural hinge joint, it is the tibia that is "weight-bearing" and one can see that it bears the majority of the weight by the way it aligns with the femur. It is also the thicker than the fibula. The talus is the lower ankle bone whose proximal end articulates with the distal ends of the tibia and fibula. Again, its articulation with the tibia bears more weight than it does with fibula. The calcaneus is the heel bone or the part of your foot you might want to karate kick with. The femur is not in the lower leg.

Sesamoid bones are located in tendons or joint capsules. They reduce friction, increase the force the tendon can pull, and/or maintain the shape of tendons when they are taut. The largest sesamoid bone in the body is the patella. The pisiform is also a sesamoid bone, but is much smaller than the patella and is located in the wrist. The scaphoid and hamate are located in the wrist, but are not sesamoid.

The tibial tuberosity can be felt just inferior to the knee on the anterior side of the leg. The olecranon is also known as the elbow, and is part of the ulna. The lateral condyle is the insertion point for the biceps femoris, and cannot be palpated through the skin. The soleal line is on the posterior surface of the tibia, and is thus not palpable through the skin.