関連する実験動画

Updated: Apr 16, 2026

Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue
12:40

Isolation and Expansion of Mesenchymal Stem/Stromal Cells Derived from Human Placenta Tissue

Published on: June 6, 2016

38.8K

ジュラ紀のエウテリアン哺乳類であり,袋類と胎盤類の分岐である

Zhe-Xi Luo1, Chong-Xi Yuan, Qing-Jin Meng

  • 1Carnegie Museum of Natural History, Pittsburgh, Pennsylvania 15213, USA. luoz@carnegiemnh.org

Nature
|August 26, 2011
PubMed
まとめ

中国で新しいジュラ紀のエウテリアン哺乳類の発見は,胎盤哺乳類の起源を3500万年遅らせます. この発見は,胎盤の初期の進化に関する化石の証拠と分子推定の間の不一致を解決するのに役立ちます.

さらに関連する動画

Dissection and Explant Culture of Murine Allantois for the In Vitro Analysis of Allantoic Attachment09:30

Dissection and Explant Culture of Murine Allantois for the In Vitro Analysis of Allantoic Attachment

Published on: January 13, 2018

8.3K
Mouse In Vivo Placental Targeted CRISPR Manipulation07:39

Mouse In Vivo Placental Targeted CRISPR Manipulation

Published on: April 14, 2023

4.0K

関連する概念動画

Gastrulation01:56

Gastrulation

Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
69.7K
Parental Care00:55

Parental Care

Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
13.1K
Formation of Species01:31

Formation of Species

Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
47.1K
Phylogeny01:23

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
64.8K
Convergent Evolution01:54

Convergent Evolution

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.
34.8K
Diversity of Protists II01:27

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
2.2K