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関連する概念動画

Bones of the Lower Limb: Tibia and Fibula01:10

Bones of the Lower Limb: Tibia and Fibula

5.0K
The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
5.0K
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

2.9K
The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
2.9K
Carbon Skeletons01:12

Carbon Skeletons

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Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
110.0K
Bone Structure01:55

Bone Structure

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
49.0K
Classification of Bones01:18

Classification of Bones

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The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The...
7.0K
Bone Markings01:26

Bone Markings

6.1K
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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Updated: Sep 9, 2025

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

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滑走路の下にある骨

Rodrigo Pérez Ortega1

  • 1Mexico City.

Science (New York, N.Y.)
|August 28, 2025
PubMed
まとめ
この要約は機械生成です。

マンモスの進化と行動に関する理解を 革命的に変えたのです マンモスの進化と行動に関する理解を 革命的に変えたのです

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Kinematics and Ground Reaction Force Determination: A Demonstration Quantifying Locomotor Abilities of Young Adult, Middle-aged, and Geriatric Rats
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Author Spotlight: Unraveling the Mechanobiology of Tendon Impingement – A Multiaxial Murine Hind Limb Explant Model
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Kinematics and Ground Reaction Force Determination: A Demonstration Quantifying Locomotor Abilities of Young Adult, Middle-aged, and Geriatric Rats
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科学分野:

  • 古生物学
  • 哺乳類学
  • 四半期地質学

背景:

  • メキシコの重要な軍事建設プロジェクトで 偶然にも大きな古生物学的な遺跡が 発見されました
  • 最初の発見は マンモスの化石が 前例のない濃度で 独特の古生物学的な環境を示唆しています

研究 の 目的:

  • メキシコ最大の 考古学的な発見を記録し分析する
  • マンモスの個体数とその古生物学を理解するための この発見の影響を調査する.
  • 大規模なインフラプロジェクトと科学的探査の交差点を探求する.

主な方法:

  • 大規模な建設現場での地質調査と発掘
  • 化石の分析,骨質学,古環境再構築など
  • 放射性炭素年代測定法やその他の年代測定法で 発見物の年代を決定します

主要な成果:

  • マンモスの化石が発見され 重要な古生物学的な遺跡となりました
  • この地域ではこれまでに記録されていない 独特の古生物学的な環境と マンモスの行動を示す証拠です
  • この発見は マンモスの分布と絶滅パターンに関する 既存の知識を再構築しています

結論:

  • メキシコで大きな考古学的発見を促した.
  • マンモスの個体数とその生態学的役割に関する 現在のモデルを改訂する必要がある.
  • この発見は 非科学的な努力から生じる 予期せぬ科学的進歩の可能性を 強調しています