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Related Concept Videos

Dense Connective Tissue01:13

Dense Connective Tissue

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Dense connective tissue contains more collagen fibers than loose connective tissue. As a consequence, it displays greater resistance to stretching. There are two major categories of dense connective tissue— regular and irregular.
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Elastin is Responsible for Tissue Elasticity01:12

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Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
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Collagens are the Major Structural Proteins of ECM01:13

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Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
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Overview of Connective Tissues Proper01:25

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Connective tissue proper is a class of connective tissue that encompasses all mature connective tissues except bone, cartilage, blood, and lymph. This extensive class of tissues has two subclasses — loose and dense connective tissues — classified based on the protein fiber arrangement and the amount of ground substance. 
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Introduction to the Skeletal System01:20

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The skeletal system is the central framework of the body, consisting of different connective tissues: bones, cartilage, tendons, and ligaments.
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Skeletal Muscle Anatomy00:55

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Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
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Tendon/Ligaments: Structure and Composition.

Sushmitha Durgam1

  • 1Department of Veterinary Clinical Medicine, College of Veterinary Medicine, The Ohio State University, 601, Vernon L Tharp Street, Columbus, OH 43210, USA.

The Veterinary Clinics of North America. Equine Practice
|July 24, 2025
PubMed
Summary
This summary is machine-generated.

Equine athletes frequently injure soft tissues like the SDFT, DDFT, and suspensory ligament. Understanding their unique structures is key to improving diagnostics and therapies for better healing and function.

Keywords:
Cellular morphologyEnthesisEquine tendonExtracellular matrixFibrocartilageLigamentTensile tendon

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Area of Science:

  • Equine sports medicine
  • Veterinary orthopedics
  • Soft tissue injury

Background:

  • Common injuries in equine athletes involve the mid-metacarpal superficial digital flexor tendon (SDFT), intrasynovial digital flexor tendon (DDFT), and suspensory ligament.
  • The SDFT has a hierarchical structure prone to strain, while the DDFT features fibrocartilage for gliding and chondrocyte-like cells.
  • Bone-ligament interface specializations in the suspensory ligament remain understudied despite frequent enthesis injuries.

Purpose of the Study:

  • To highlight the differential micro- and macro-structures of equine tendons and ligaments.
  • To emphasize the importance of structural understanding for diagnostics and therapies.
  • To guide improvements in healing and functional restoration for injured equine athletes.

Main Methods:

  • Comparative analysis of soft tissue structures.
  • Review of existing literature on equine tendon and ligament anatomy and injury.
  • Focus on micro- and macro-structural specializations.

Main Results:

  • Distinct structural characteristics exist between the SDFT, DDFT, and suspensory ligament.
  • The SDFT's hierarchical nature predisposes it to repetitive strain injuries.
  • The DDFT's fibrocartilage and ECM composition facilitate gliding, and suspensory ligament enthesis structures require further investigation.

Conclusions:

  • The unique structures of equine tendons and ligaments necessitate tailored approaches.
  • Consideration of differential micro- and macro-structures is crucial for effective diagnostics.
  • Refining current and developing novel therapies requires understanding these specialized structures to enhance healing and restore function.