What is the arrangement of bones?
Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.
What is the difference between long and short bones?
Long bones, such as the femur, are longer than they are wide. Short bones, such as the carpals, are approximately equal in length, width, and thickness. Flat bones are thin, but are often curved, such as the ribs. Irregular bones such as those of the face have no characteristic shape.
Which part of a long bone is involved in articulation?
Epiphysis. This part is at the extreme ends of the bone (epi = above), where joints (articulations) form. Articular cartilage.
What is the structure of a long bone?
A long bone is a bone that has a shaft and 2 ends and is longer than it is wide. Long bones have a thick outside layer of compact bone and an inner medullary cavity containing bone marrow. The ends of a long bone contain spongy bone and an epiphyseal line.
What type of bone is arranged in concentric layers?
COMPACT BONE (f) – pink The compact bone is a dense bone found in the diaphysis. Its repeated pattern is arranged in concentric layers of solid bone tissue.
What are short long bones?
Shortened fetal long bones (SFLB) can involve either the upper limb and/or the lower limb. It is a broad descriptive entity which can include. short fetal femur. short fetal humerus. short fetal tibia-fibula.
Which are short bones?
Short Bones Are Cube-shaped The carpals in the wrist (scaphoid, lunate, triquetral, hamate, pisiform, capitate, trapezoid, and trapezium) and the tarsals in the ankles (calcaneus, talus, navicular, cuboid, lateral cuneiform, intermediate cuneiform, and medial cuneiform) are examples of short bones.
Where are short bones found?
Short bones are shaped roughly as a cube and contain mostly spongy bone. The outside surface is comprised of a thin layer of compact bone. Short bones are located in the hands and feet. The patella (kneecap) is also considered a short bone.
What is an articulation?
As the name implies, an articulation is where two bone surfaces come together (articulus = “joint”). These surfaces tend to conform to one another, such as one being rounded and the other cupped, to facilitate the function of the articulation.
Gross Anatomy of Bone The structure of a long bone allows for the best visualization of all of the parts of a bone ((Figure)). A long bone has two parts: the diaphysis and the epiphysis. The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone.
What is considered a short bone?
A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness. The only short bones in the human skeleton are in the carpals of the wrists and the tarsals of the ankles.
What is the difference between compact bone and long bone?
Compact bone is the denser, stronger of the two types of osseous tissue ( Figure 6.3.6 ). It makes up the outer cortex of all bones and is in immediate contact with the periosteum. In long bones, as you move from the outer cortical compact bone to the inner medullary cavity, the bone transitions to spongy bone.