Adult Long Bone Structure Flashcards
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Questions and Answers

What is the difference between the epiphyseal plate and the epiphyseal line?

  • The epiphyseal plate produces bone, while the epiphyseal line is formed after it stops producing bone. (correct)
  • The epiphyseal line is found only in children.
  • Both are made of cartilage.
  • The epiphyseal plate is thicker than 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?

    <p>Blood supply to the epiphyses of the bone.</p> Signup and view all the answers

    What happens at the diaphyseal side of the epiphyseal plate?

    <p>Hyaline cartilage ossifies.</p> Signup and view all the answers

    What runs between the proximal and distal ends of a long bone?

    <p>Diaphysis.</p> Signup and view all the answers

    What fills the medullary cavity of a long bone?

    <p>Yellow marrow.</p> Signup and view all the answers

    What characterizes compact bone?

    <p>Dense and hard walls of the diaphysis.</p> Signup and view all the answers

    What is the wider section at each end of the bone called?

    <p>Epiphysis.</p> Signup and view all the answers

    What is found in the spongy bone of the epiphyses?

    <p>Red marrow.</p> Signup and view all the answers

    What is the function of articular cartilage?

    <p>Covers surfaces that form joints and allows ease of movement.</p> Signup and view all the answers

    What is the metaphysis?

    <p>Growth zone between the epiphysis and the diaphysis.</p> Signup and view all the answers

    What is the function of the metaphysis?

    <p>Transfer loads from weight-bearing joint surfaces to the diaphysis.</p> Signup and view all the answers

    What does the periosteum contain?

    <p>Blood vessels, nerves, and lymphatic vessels.</p> Signup and view all the answers

    What occurs in the endosteum?

    <p>Bone growth, repair, and remodeling.</p> Signup and view all the answers

    What are Sharpey's fibres?

    <p>Matrix of connective tissue made of collagen fibres.</p> Signup and view all the answers

    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.

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