Video Experimental Relacionado
Updated: May 5, 2026
09:16
Analyzing Craniofacial Morphogenesis in Zebrafish Using 4D Confocal Microscopy
Published on: January 30, 2014
10.6K
El desarrollo craneofacial de los peces brujos y la evolución de los vertebrados
Yasuhiro Oisi1, Kinya G Ota, Shigehiro Kuraku
1Department of Biology, Graduate School of Science, Kobe University, Kobe 657-8501, Japan.
Nature
|December 21, 2012
Resumen
Los vertebrados sin mandíbula, los peces bruja y las lampreas, muestran un patrón de desarrollo craneofacial compartido. Esto sugiere que los rasgos del pez brujo son secundarios, y este patrón puede representar la condición ancestral de los vertebrados.
Área de la Ciencia:
- Biología del desarrollo evolutivo Biología del desarrollo evolutivo
- La genómica comparada es una genómica comparada.
- Paleontología de los vertebrados.
Sus antecedentes:
- Los ciclostomas (peces leporinos y lampreas) son los vertebrados más basales.
- Se pensaba que los rasgos del pez leproso, como el origen de la adenohypophysis, representaban un estado ancestral.
- Estudios anteriores carecían de datos detallados sobre el desarrollo craneofacial de los peces brujas.
Objetivo del estudio:
- Para investigar el desarrollo craneofacial en embriones de pez brujo.
- Para aclarar el origen del pez bruja adenohypophysis.
- Para comparar el desarrollo del pez brujo con otros vertebrados y comprender los patrones evolutivos.
Principales métodos:
- Análisis embriológico de embriones escalonados de pez bruja.
- Estudios anatómicos comparativos de las estructuras craneofaciales.
- Interpretación filogenética de los datos del desarrollo.
Principales resultados:
- La adenohipófisis del pez brujo surge ectodermalmente, alineándose con los datos moleculares.
- Se identificó un patrón de desarrollo craneofacial panciclostomo.
- Es probable que las características específicas del pez leproso sean modificaciones secundarias.
Conclusiones:
- El desarrollo de la adenohipófisis de Hagfish no es un rasgo ancestral de los vertebrados.
- Existe un patrón de desarrollo compartido a través de los ciclostomas.
- Este patrón pan-ciclostomo puede reflejar el programa de desarrollo craneofacial ancestral de los vertebrados.
Videos de Conceptos Relacionados
01:30Neurulation
40.4K
Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
40.4K
02:35What is Evolutionary History?
31.1K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
31.1K
01:29Bone Formation by Intramembranous Ossification
16.2K
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
16.2K
01:08Overview of the Skull
12.2K
The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
12.2K
01:14Cranial Bones: Superior and Posterior View
7.6K
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
7.6K
01:22Sutures of the Skull
13.9K
The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
13.9K