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Related Concept Videos

Accessory Structures of the Skin: Nails01:05

Accessory Structures of the Skin: Nails

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Nails are one of the important accessory structures of the skin. They are hard, protective structures that cover the dorsal surface of the distal phalanges of fingers and toes. Nails are composed of specialized keratinized cells and serve various functions, including protection, sensation, and manual dexterity.
The main components of a nail include the following.
Nail Plate: The nail plate is the visible portion of the nail that extends beyond the fingertips or toes. It is a hard, translucent...
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Dark Triad and Person Perception01:29

Dark Triad and Person Perception

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Person perception is influenced by both external behaviors and the observer’s internal characteristics, including personality traits. Individuals with dark personality traits, comprising psychopathy, Machiavellianism, and narcissism — collectively known as the dark triad – exhibit manipulative and exploitative tendencies in social contexts. These traits affect how they perceive others and how they are perceived.The Role of Dark Personality Traits in Person PerceptionBlack et...
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Bone Markings01:26

Bone Markings

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Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
Articulating Projections
Articulating projections are found where two bones meet to form a joint. These structures are usually found at the ends of bones. The largest articulation is a rounded projection called the head, supported by a narrow neck at the ends of...
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Blinding01:11

Blinding

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Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
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Moment of a Force: Problem Solving01:29

Moment of a Force: Problem Solving

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Understanding the scalar formulation of the moment of a force and applying it correctly through problem-solving is crucial in designing and analyzing mechanical systems. Here are the steps for problem-solving with the moment of a force:
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Necrosis01:16

Necrosis

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Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
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Related Experiment Video

Updated: Nov 4, 2025

Non-Invasive Visualization of Nailbed Microvascular Morphology in Mice Using Capillaroscopy
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Non-Invasive Visualization of Nailbed Microvascular Morphology in Mice Using Capillaroscopy

Published on: February 28, 2025

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Through a Nail Darkly

Dimitris Rigopoulos1, Ileana Afroditi Kleidona1, Stamatios Gregoriou1

  • 11st Department of Dermatology, Faculty of Medicine, National and Kapodistrian University of Athens, Andreas Syggros Hospital, Athens, Greece.

Skin Appendage Disorders
|May 31, 2021
PubMed
Summary

No abstract available in PubMed .

Keywords:
MelanonychiaNail dermoscopyNail pigmentation

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