Sage-Tips

What is the weakest part of a growing adolescent long bone?

The epiphyseal plate is a weak point because of the lack of calcification. What is the weakest part of a developing, adolescent long bone? Osteocytes, literally “bone cells,” are the primary structural and maintenance cells found in bone.

What are the 7 parts of a long bone?

Terms in this set (9)

• epiphysis. The end of a long bone – an expanded portion at each end of the bone which articulates with another bone.
• articular cartilage. Hyaline cartilage that covers ends of bones in synovial joints.
• Diaphysis. The shaft of the bone.
• Periosteum.
• Compact Bone.
• Spongy bone.
• Medullary Cavity.
• Marrow.

Which bone would likely take the longest to heal?

Though, some bones heal faster than others regardless of age. A fracture of the upper arm or humerus may heal uneventfully in several weeks, while a fracture in the forearm takes much longer. The femur, or thighbone, is the longest and strongest bone in the body and difficult to break without major trauma.

Which of the following is a major component of the part of the bone labeled E?

Which of the following is the major component of the part of the bone labeled E? Yellow bone marrow within the medullary cavity is composed primarily of adipose tissue (fat).

What is epiphyseal fracture?

Areas of the bone immediately above and below the growth plate may fracture. They are called the epiphysis (the tip of the bone) and metaphysis (the “neck” of the bone). The most common growth plate fracture runs through the metaphysis.

Why is the epiphyseal plate a weak spot in bone?

The growth plates are weak areas of your child’s growing skeleton. Because they are even weaker than the nearby ligaments and tendons that connect bones to other bones and muscles, growth plates are vulnerable to injury.

What are the 3 structures of long bones?

Long bones are longer than they are wide. They can be divided into three regions – epiphysis, metaphysis and the diaphysis. The epiphysis contains the spongy bone (also called cancellous), which in turn contains the red bone marrow that is responsible for synthesizing blood cells.

What are the structures of the long bones?

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.

Do all bones stop growing by the end of adolescence?

All bones stop growing by the end of adolescence. Closure of the epiphyseal plate stops all bone growth. Flat bones are formed by endochondral ossification. Appositional growth of cartilage occurs when chondrocytes divide and secrete new matrix within, expanding cartilage from within.

Which is the most common type of cartilage and also the weakest?

Hyaline Cartilage
Hyaline Cartilage This is the most common form of cartilage in the body and also the weakest type. It is mostly made up of collagen (type II) with relatively few elastic fibres and is surrounded by a perichondrium.

What are cancellous bones?

Cancellous bone is the meshwork of spongy tissue (trabeculae) of mature adult bone typically found at the core of vertebral bones in the spine and the ends of the long bones (such as the femur or thigh bone).