Does the epiphyseal plate consist of 4 zones of chondrocytes?

Does the epiphyseal plate consist of 4 zones of chondrocytes?

The epiphyseal plate is composed of four zones of cells and activity. The reserve zone, the region closest to the epiphyseal end of the plate, contains small chondrocytes within the matrix.

What are the 4 layers of the epiphyseal plate?

Terms in this set (4)

  • Layer closest to epiphysis; where cartilage remains. Resting zone.
  • Chondrocytes producing new cartilage cells. Proliferating zone.
  • Cartilage cells are dying off. Degenerating zone.
  • Zone where bone is forming. Ossification zone.

What is the epiphyseal plate composed of?

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 are the 5 epiphyseal plate zones?

resting zone, 2. proliferation zone, 3. hypertrophic cartilage zone, 4. calcified cartilage zone, and 5.

Which zone of cartilage anchors the epiphyseal plate to the epiphysis?

4 Cards in this Set

Zone of Reserve Cartilage closest to epiphysis* anchor plate to epiphyseal bone
Zone of Proliferating Cartilage 2nd closest to epiphysis* chondrocytes stacked, replacing dead cells at diaphyseal surface
Zone of Hypertrophic Cartilage 3rd closest to epiphysis* chondrocytes form mature cartilage

What is the hypertrophic zone?

The germinal zone of the physis borders the epiphysis. The epiphyseal cartilage cells grow toward the metaphysis and form columns of cells. These columns degenerate, undergo hypertrophy, and then calcify at the metaphysis to form new bone. The hypertrophic zone (shaded red) is the usual site of physeal fractures.

Which zone of the epiphyseal plate do cartilage cells undergo mitosis?

These chondrocytes do not participate in bone growth; instead, they secure the epiphyseal plate to the osseous tissue of the epiphysis. The proliferative zone, the next layer toward the diaphysis, contains stacks of slightly-larger chondrocytes. It continually makes new chondrocytes via mitosis.

What are the zones of ossification?

Zone of ossification: Osteoblasts deposit bone matrix on the exposed plates of calcified cartilage. Zone of resorption: Osteoclasts absorb the oldest ends of the bone spicules. Note the high vascular density in this area: one capillary loop for each chondrocytic column.

What area epiphysis or diaphysis is made up of a thin layer of compact bone and a thick spongy bone?

73 Cards in this Set

what area of the long bone is covered with cartilage? epiphysis
what type of cartilage is articular cartilage? hyaline cartilage
What area(epiphysis or diaphysis) is made up of a thin layer of compact bone and a thick layer of spongy? epiphsis

What are ligaments made of?

What are ligaments made of? Ligaments are like cords made of connective tissue, elastic fibers that are somewhat stretchy, and collagen, a protein that binds tissues in animals.

Which of the following regions of the epiphyseal plate is nearest the epiphysis?

The reserve zone is the region closest to the epiphyseal end of the plate and contains small chondrocytes within the matrix.

Which zone of the epiphyseal plate is converted to bone?

A. Zone of resting cartilage – anchors the epiphyseal plate to the epiphysis. B. Zone of proliferating cartilage – Large chondrocytes arranged in stacks divide to replace those dying at the diaphyseal side of the epiphyseal plate. D. Zone of calcified cartilage – is converted into bone by endochondral ossification.

What is the proliferation zone in cartilage?

Proliferation Zone Area of cartilage on “diaphysis side” of epiphyseal plate that is “rapidly dividing” Proliferation Zone New cells formed move upward, pushing epiphysis away from diaphysis causing lengthening Proliferation Zone

What happens to the cartilage matrix when it calcifies?

Cartilage lacunae enlarge and erode, forming interconnecting spaces Calcification Zone Matrix calcifies, cartilage cells die, matrix begins deteriorating, blood vessels invade cavity Calcification Zone Surrounding cartilage matrix calcifies, chondrocytes die and deteriorate

How is the medullary cavity formed during bone formation?

During the process of bone formation in a fetus, a primary ossification center develops in the epiphysis of a cartilage model of a long bone. As long bones form in the fetus, the formation of the medullary cavity occurs because of the actions of osteoblast cells.

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