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関連する概念動画

Tooth Anatomy01:21

Tooth Anatomy

2.7K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
2.7K
Teeth01:15

Teeth

2.2K
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
2.2K
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

197
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
197
Veneer01:19

Veneer

559
Veneer refers to a thin sheet of wood, typically produced to a thickness of about one-eighth of an inch or less. This material is crafted through various methods, the most common being rotary cutting. In this process, a log is mounted into a large lathe and spun against a knife edge, peeling off a continuous strip of wood as the knife penetrates deeper into the rotating log, creating a rotary-cut veneer.
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
559
Convergent Evolution01:54

Convergent Evolution

27.5K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.5K
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

106
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
106

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Updated: Apr 26, 2026

A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws
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A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws

Published on: April 24, 2016

11.0K

進化: 歯の構造が再設計された.

Zhe-Xi Luo1

  • 1Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, Illinois 60637, USA.

Nature
|August 1, 2014
PubMed
まとめ

No abstract available in PubMed .

さらに関連する動画

The Slice Culture Method for Following Development of Tooth Germs In Explant Culture
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The Slice Culture Method for Following Development of Tooth Germs In Explant Culture

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Establishing Organoids from Human Tooth as a Powerful Tool Toward Mechanistic Research and Regenerative Therapy
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Establishing Organoids from Human Tooth as a Powerful Tool Toward Mechanistic Research and Regenerative Therapy

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関連する実験動画

Last Updated: Apr 26, 2026

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