Examples of epiphyseal plate in the following topics:
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- The epiphyseal plate is the area of growth in a long bone.
- On the epiphyseal side of the epiphyseal plate, cartilage is formed.
- All that remains of the epiphyseal plate is the epiphyseal line .
- As a bone matures, the epiphyseal plate progresses to an epiphyseal line.
- (b) Epiphyseal lines are the remnants of epiphyseal plates in a mature bone.
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- A temporary form of joint called an epiphyseal (growth) plate, is one where the cartilage is converted into bone before adult life.
- The epiphyseal plate is a hyaline cartilage plate in the metaphysis at each end of a long bone.
- The epiphyseal plate is found in children and adolescents.
- In puberty, increasing levels of estrogen, in both females and males, leads to increased apoptosis of chondrocytes in the epiphyseal plate.
- In adults who have stopped growing, the plate is replaced by an epiphyseal line.
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- Between the epiphysis and diaphysis (the long midsection of the long bone) lies the metaphysis, including the epiphyseal plate (growth plate) .
- At the joint, the epiphysis is covered with articular cartilage; below that covering is a zone similar to the epiphyseal plate, known as subchondral bone.
- For example, the head of the femur (which is a part of the hip joint complex) is a pressure epiphyses.
- These epiphyses assist in transmitting the weight of the human body and are the regions of the bone which is under pressure during movement or locomotion; hence, their name.
- Image shows the location of the epiphyseal plates (or lines) and the articular surfaces of long bones.
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- Secondary ossification occurs after birth at the epiphyses of long bones and continues until skeletal maturity.
- It forms the epiphyses of long bones and the extremities of irregular and flat bones.
- The diaphysis and both epiphyses of a long bone are separated by a growing zone of cartilage (the epiphyseal plate).
- When a child reaches skeletal maturity (18 to 25 years of age), all of the cartilage is replaced by bone, fusing the diaphysis and both epiphyses together (epiphyseal closure).
- Between the epiphysis and diaphysis (the long midsection of the long bone) lies the metaphysis, including the epiphyseal plate (growth plate).
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- Near the epiphysis, they anastomose with the metaphyseal and epiphyseal arteries.
- The blood supply of the immature bones is similar, but the epiphysis is a discrete vascular zone separated from the metaphysis by the growth plate.
- Epiphyseal and metaphyseal arteries enter on both sides of the growth cartilage, with anastamoses between them being few or absent.
- Image shows the location of the epiphyseal plates (or lines) and the articular surfaces of long bones.
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- The epiphyseal (growth) plates are examples of synchondroses.
- Image demonstrates a synchondrosis joint with epiphyseal plate (temporary hyaline cartilage joint) indicated (a) and a symphysis joint (b).
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- Secondary ossification occurs after birth, and forms the epiphyses of long bones and the extremities of irregular and flat bones.
- The diaphysis and both epiphyses of a long bone are separated by a growing zone of cartilage (the epiphyseal plate).
- When the child reaches skeletal maturity (18 to 25 years of age), all of the cartilage is replaced by bone, fusing the diaphysis and both epiphyses together (epiphyseal closure).
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- The bone continues to grow and elongate as the cartilage cells at the epiphyses divide.
- In the last stage of prenatal bone development, the centers of the epiphyses begin to calcify.
- Secondary ossification centers form in the epiphyses as blood vessels and osteoblasts enter these areas and convert hyaline cartilage into spongy bone.
- Until adolescence, hyaline cartilage persists at the epiphyseal plate (growth plate), which is the region between the diaphysis and epiphysis that is responsible for the lengthwise growth of long bones.
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- 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.
- These bones are expanded into broad, flat plates, as in the cranium (skull), ilium (pelvis), sternum, rib cage, sacrum, and scapula.
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- Acromegaly is a syndrome that results when the anterior pituitary gland produces excess growth hormone (GH) after epiphyseal plate closure at puberty.
- The distinction between gigantism (occurring in children) and acromegaly (occurring in adults) can be made by the occurrence of the adenoma in relation to the closure of the epiphyses.
- If elevated growth hormone levels occur before the closure of the epiphyses (i.e. in prepubertal children), then gigantism ensues.
- If it occurs after the closure of the epiphyses (i.e., in adults), then acromegaly ensues.