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関連する概念動画

Accessory Structures of the Skin: Hair and Hair Follicles01:16

Accessory Structures of the Skin: Hair and Hair Follicles

2.3K
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
2.3K
Reticular Dermis01:15

Reticular Dermis

2.6K
The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
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Papillary Dermis01:11

Papillary Dermis

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Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
2.9K
Sensory Functions of the Skin01:16

Sensory Functions of the Skin

5.1K
The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
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Layers of the Epidermis01:21

Layers of the Epidermis

4.1K
The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
4.1K
Introduction to the Integumentary System01:25

Introduction to the Integumentary System

8.3K
The integumentary system is the organ system that comprises the skin and its associated structures. It is the largest system in the human body and plays a crucial role in protecting and maintaining homeostasis. The integumentary system serves several functions including protection, regulation, sensation, and secretion.
The skin, which is the primary organ of the integumentary system, consists of three main layers: the epidermis, dermis, and hypodermis (subcutaneous tissue). The epidermis is the...
8.3K

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関連する実験動画

Updated: Jul 10, 2025

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
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Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

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皮膚のパターンのメカニカル特性

Samhita P Banavar1, Celeste M Nelson1,2

  • 1Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA.

Science (New York, N.Y.)
|November 23, 2023
PubMed
まとめ
この要約は機械生成です。

モルフォゲンは 組織のメカニズムを変えることで 羽の芽生えを誘導します この研究により これらのシグナル伝達分子が 発達中の皮膚の物理的性質に 影響して 羽の形成を起こすことが明らかになりました

さらに関連する動画

Measuring and Modeling Contractile Drying in Human Stratum Corneum
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Measuring and Modeling Contractile Drying in Human Stratum Corneum

Published on: March 1, 2017

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Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology
13:58

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology

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関連する実験動画

Last Updated: Jul 10, 2025

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
07:07

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

31.9K
Measuring and Modeling Contractile Drying in Human Stratum Corneum
08:00

Measuring and Modeling Contractile Drying in Human Stratum Corneum

Published on: March 1, 2017

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Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology
13:58

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology

Published on: June 25, 2014

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科学分野:

  • 発達生物学
  • 組織力学
  • 形質変異

背景:

  • 羽の芽が出るのは 複雑な発達過程です
  • 毛羽の形成に起因するモルフォゲンの役割は完全に理解されていません.
  • 組織力学は胚の発達に 作用することが知られている.

研究 の 目的:

  • 羽根の芽生え時の 組織メカニズムに影響を与える様子を調査する.
  • 組織メカニズムの変化が羽根芽の形成を促進するメカニズムを解明する.

主な方法:

  • モルフォゲン・グラデーションをシミュレートするために コンピューティング・モデリングを使用した.
  • 組織の弾力性と粘度の変化を分析した.
  • 鶏の胚の羽根の発達を観察した.

主要な成果:

  • 特定のモルフォゲンの濃度が組織の硬化に局所的な変化を誘発することを示した.
  • 組織構造の変化と 羽根の形成の相関関係を示した
  • 機械伝達に関わる重要な信号伝達経路を特定した.

結論:

  • モルフォゲンによって引き起こされる組織メカニズムの変化は 羽の芽生えに不可欠です
  • この研究は,シグナル伝達分子と発達中の物理的組織特性との間にメカニズム的なリンクを提供します.
  • 発見は形態発生のより広範な原理への洞察を提供します.