Questions and Answers
What is the difference between the epiphyseal plate and the epiphyseal line?
What is an epiphyseal plate?
Growth plate made of hyaline cartilage.
What replaces hyaline cartilage after the epiphyseal plate becomes the epiphyseal line?
Osseous tissue.
What do epiphyseal arteries and veins provide?
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What happens at the diaphyseal side of the epiphyseal plate?
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What runs between the proximal and distal ends of a long bone?
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What fills the medullary cavity of a long bone?
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What characterizes compact bone?
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What is the wider section at each end of the bone called?
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What is found in the spongy bone of the epiphyses?
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What is the function of articular cartilage?
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What is the metaphysis?
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What is the function of the metaphysis?
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What does the periosteum contain?
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What occurs in the endosteum?
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What are Sharpey's fibres?
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Study Notes
Long Bone Structure Overview
- Long bones consist of diaphysis, epiphysis, and metaphysis regions, essential for skeletal function.
Epiphyseal Plate vs. Epiphyseal Line
- Epiphyseal plate: a cartilaginous growth plate responsible for bone lengthening in immature bones.
- Epiphyseal line: a bony structure that replaces the plate once growth ceases in adulthood.
Replacement of Growth Plates
- Once the epiphyseal plate converts to the epiphyseal line, the hyaline cartilage is replaced by osseous tissue, contributing to red blood cell formation.
Blood Supply
- Epiphyseal arteries and veins are crucial for supplying blood to the epiphyses, ensuring nutrient delivery and waste removal.
Diaphysis and Medullary Cavity
- Diaphyseal side: area where hyaline cartilage ossifies.
- Medullary cavity: hollow space within the diaphysis filled with yellow marrow, primarily composed of adipocytes.
Bone Composition
- Compact bone forms the dense outer walls of the diaphysis, providing structural support.
- Epiphysis: the wider ends of long bones containing spongy bone filled with red marrow for hematopoiesis.
Articular Cartilage
- Articular cartilage consists of hyaline cartilage covering joint surfaces, allowing for smooth movement and joint function.
Function of Metaphysis
- Metaphysis acts as a growth zone, facilitating the transfer of loads from weight-bearing joint surfaces to the diaphysis.
Periosteum and Endosteum
- Periosteum: outer layer containing blood vessels, nerves, and lymphatics for nourishing compact bone.
- Endosteum: inner lining where bone growth, repair, and remodeling occur.
Sharpey's Fibers
- Sharpey's fibers are collagen fibers connecting the periosteum to the underlying bone, contributing to the structural integrity of the bone.
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Description
This quiz focuses on the structure and differences between the epiphyseal plate and epiphyseal line in adult long bones. By reviewing these flashcards, you will enhance your understanding of bone growth and ossification processes. Perfect for anatomy students or anyone interested in human biology.
