Video Experimental Relacionado
Updated: Sep 10, 2025
13:43
Two-step Approach to Explore Early- and Late-stages of Organ Formation in the Avian Model: The Thymus and Parathyroid Glands Organogenesis Paradigm
Published on: June 17, 2018
7.5K
Análisis ecomorfológico del órgano lumbosacral de las aves en un contexto evolutivo
Idriss Pelletan1, Raphaël Cornette2, Anick Abourachid1
1Muséum National d'Histoire Naturelle CNRS, Mecadev, Paris, France.
Journal of morphology
|August 23, 2025
Resumen
El órgano lumbosacral (LSO) en las aves influye en la forma del canal vertebral, particularmente en las especies que se posan. Su tamaño se correlaciona con la estructura pélvica y se ve afectado por la filogenia y el tamaño del cuerpo.
Área de la Ciencia:
- Anatomía comparada
- Paleontología de los vertebrados
- Biomecánica
Sus antecedentes:
- Las aves poseen un órgano lumbosacral único dentro del sínsacro.
- El impacto del LSO en la morfología del canal espinal y su importancia funcional siguen siendo en gran medida inexplorados.
Objetivo del estudio:
- Investigar la relación entre la forma endocast del canal vertebral sinsacral, influenciada por el LSO, y los hábitos locomotores, la morfología pélvica y la filogenia de las aves.
- Para determinar si la morfología LSO es indicativa de comportamientos específicos y relaciones evolutivas.
Principales métodos:
- Utilizó morfometría geométrica 2D y 3D para analizar la forma de los moldes digitales del canal vertebral sinsacral.
- Señal filogenético cuantificado y alometría para evaluar las influencias evolutivas y relacionadas con el tamaño.
Principales resultados:
- La forma del canal vertebral endocast está significativamente influenciada por el LSO, especialmente en las aves posadas.
- La morfología pélvica varía con la morfología del canal vertebral: el LSO más grande corresponde a una pelvis más corta y más ancha; el LSO más pequeño a una pelvis más larga y delgada.
- La filogenia y el tamaño corporal (allometría) también tienen un impacto en la morfología de LSO.
Conclusiones:
- El LSO juega un papel crucial en la configuración de la morfología del canal vertebral sinsacral en las aves.
- La morfología asociada a LSO está relacionada con las adaptaciones locomotoras y la estructura pélvica.
- La historia evolutiva y el tamaño corporal son factores significativos en la morfología de LSO.
Videos de Conceptos Relacionados
01:15Development of the Lymphatic System
1.1K
The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
1.1K
01:54Convergent Evolution
28.9K
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.
28.9K
01:23Phylogeny
47.1K
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.
47.1K
01:19Abdominal Regions and Quadrants
12.1K
To promote clear communication, for instance, about the location of a patient's abdominal pain or a suspicious mass, anatomists and clinicians typically use imaginary lines to categorize the abdominopelvic cavity into either four quadrants or nine regions to identify organs in the cavity.
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four...
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four...
12.1K
01:21Spinal Nerves: Plexus II
848
The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
848
02:24Comparative Excretory Systems
23.5K
Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
23.5K