What is the epiphyseal plate line?

An epiphyseal line is an epiphyseal plate that has become ossified. The process of it forming from an epiphyseal plate is named epiphyseal closure. In adult humans, it marks the point of fusion between the epiphysis and the diaphysis.

What is epiphyseal cartilage and epiphyseal line?

When the chondrocytes in the epiphyseal plate cease their proliferation and bone replaces the cartilage, longitudinal growth stops. All that remains of the epiphyseal plate is the epiphyseal line ((Figure)). Progression from Epiphyseal Plate to Epiphyseal Line.

What type of tissue are epiphyseal plates composed of?

hyaline cartilage
The epiphyseal plate is mostly composed of hyaline cartilage and is visible in radiographs of young animals as a radiolucent line between the epiphysis and the metaphysis2 (FIGURE 1). In mature animals, the epiphysis consists of cancellous bone surrounded by a thin layer of compact bone.

What is the connection of the epiphyseal plate in the bone growth?

Bones grow in length at the epiphyseal plate by a process that is similar to endochondral ossification. The cartilage in the region of the epiphyseal plate next to the epiphysis continues to grow by mitosis. The chondrocytes, in the region next to the diaphysis, age and degenerate.

What happens at the epiphyseal plate?

When bone growth is complete, the epiphyseal cartilage is replaced with bone, which joins it to the diaphysis. Fractures of the epiphyseal plates in children can lead to slow bone growth or limb shortening. The coordinated activity of these bone cells allows bone to grow, repair itself, and change shape.

What is the purpose of the epiphyseal plate?

The epiphyseal growth plate is the main site of longitudinal growth of the long bones. At this site, cartilage is formed by the proliferation and hypertrophy of cells and synthesis of the typical extracellular matrix.

What is the function of epiphyseal cartilage?

Epiphyseal cartilage is hyaline cartilage tissue with a gelatinous texture, and it is responsible for the longitudinal growth of the long bones in birds and mammals. It is located between the epiphysis and the diaphysis.

What does epiphyseal mean?

Epiphysis, expanded end of the long bones in animals, which ossifies separately from the bone shaft but becomes fixed to the shaft when full growth is attained. 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 is found in the epiphyseal plate?

The epiphyseal plate is the area of growth in a long bone. It is a layer of hyaline cartilage where ossification occurs in immature bones. On the epiphyseal side of the epiphyseal plate, cartilage is formed. On the diaphyseal side, cartilage is ossified, allowing the diaphysis to grow in length.

How do you know if epiphyseal plates are closed?

On an x-ray, growth plates look like dark lines at the ends of the bones. At the end of growth, when the cartilage completely hardens into bone, the dark line will no longer be visible on an x-ray. At that point, growth plates are considered closed.

How does the epiphyseal plate work?

What are the four zones of the epiphyseal plate?

Epiphyseal plate. Consists of four zones: resting cartilage, proliferating cartilage, hypertrophic cartilage, and calcified cartilage. Because of the cell division in the epiphyseal (growth) plate, the diaphysis of a bone increases in length.

Are epiphyseal plates located in the skull?

Yes, there are epiphyseal plates in the skull, but most of the activity there occurs at age less than one year. After that, most of the bones will be completely fused.

What is the main function of epiphyseal plate?

In simple words, its function is to uniformly distribute pressure across the joints to assist in easier mobility. The porous nature of the enlarged section lightens the weight of the bone. In young children, long bones elongate when new cartilage, produced in the epiphyseal plate, is pushed to the edge of the growth site.

What are the layers of the epiphyseal plate?

As seen in longitudinal section, the normal epiphyseal plate consists of four distinct layers (Fig. 2) : (1) resting cells, (2) proliferating cells, (3) hypertrophying cells, and (4) endochondal ossification. The space between the cells is filled with cartilage matrix or intercellular substance.