What is the covering of epiphysis?
The epiphysis is made of spongy cancellous bone covered by a thin layer of compact bone. It is connected to the bone shaft by the epiphyseal cartilage, or growth plate, which aids in the growth of bone length and is eventually replaced by bone.
What type of tissue covers the end of the epiphysis?
The ends of epiphyses are covered with hyaline cartilage (articular cartilage). At the cessation of growth, the epiphyses fuse to the diaphysis, thus obliterating the intermediate area known as the epiphyseal plate or growth plate.
What is the covering layer of bone?
periosteum
The tough, thin outer membrane covering the bones is called the periosteum.
What covers the ends of long bones?
Epiphysis – ends of long bone that covers the diaphysis. a. articular cartilage –hyaline cartilage that covers the joint surface where one bone meets another.
What is articular cartilage?
Articular cartilage is the smooth, white tissue that covers the ends of bones where they come together to form joints. Healthy cartilage in our joints makes it easier to move. It allows the bones to glide over each other with very little friction. Articular cartilage can be damaged by injury or normal wear and tear.
Which substance covers the surface of the epiphysis of a long bone?
The ends of epiphyses are covered with hyaline cartilage (“articular cartilage”). The longitudinal growth of long bones is a result of endochondral ossification at the epiphyseal plate.
Does articular cartilage cover the Diaphysis?
Articular cartilage –a layer of hyaline cartilage covering the epiphyses for protection purposes . Periosteum – a layer fibrous connective tissue covering the diaphysis ; also involved in the formation and repair of a bone . Endosteum – a layer of epithelial tissue lining the inside wall of the medullary cavity.
Why does periosteum cover articular cartilage?
The periosteum doesn’t cover the portion of bones that contains articular cartilage, which is the cartilage found in joints that keeps the bones from rubbing together. It is not as tightly packed and contains cells that help in bone growth and repair.
Which specific cartilage type covers the ends of long bones?
Hyaline cartilage covers the ends of long bones as articular cartilage, providing springy pads that absorb compression at joints.
What is the hyaline cartilage found covering the ends of bones within a joint called?
articular cartilage
Hyaline cartilage is found in the articular cartilage that covers the ends of the bones within a joint.
Where is articular cartilage?
What is articular wear and tear?
Mechanical degeneration (wear and tear) of articular cartilage occurs with the progressive loss of the normal cartilage structure and function. This initial loss begins with cartilage softening then progresses to fragmentation.
When does the metaphysis become the epiphyseal plate?
During growth, the metaphysis contains the epiphyseal plate, the site of long bone elongation described later in the chapter. When the bone stops growing in early adulthood (approximately 18–21 years), the epiphyseal plate becomes an epiphyseal line seen in the figure.
How does the articular cartilage protect the bone?
The articular cartilage is a thin layer of hyaline cartilage covering the part of the epiphysis where the bone forms an articulation (joint) with another bone. Articular cartilage reduces friction and absorbs shock at freely movable joints. Because articular cartilage lacks a perichondrium and lacks blood vessels, repair of damage is limited.
Which is the hollow region of the diaphysis?
The hollow region in the diaphysis is called the medullary cavity, which is filled with yellow marrow. The walls of the diaphysis are composed of dense and hard compact bone. Figure 1. Anatomy of a Long Bone. A typical long bone shows the gross anatomical characteristics of bone.
Where are the bone cells lining the medullary cavity?
Lining the inside of the bone adjacent to the medullary cavity is a layer of bone cells called the endosteum (endo- = “inside”; osteo- = “bone”). These bone cells (described later) cause the bone to grow, repair, and remodel throughout life.