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Videos de Conceptos Relacionados

Cell Diversity01:13

Cell Diversity

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The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
Multicellular...
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What are Cells?01:15

What are Cells?

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Cells are the smallest and basic units of life, whether it is a single cell that forms the entire organism, e.g., in a bacterium, or trillions of them, e.g., in humans. No matter what organism a cell is a part of, they share specific characteristics.
Basic Characteristics of Cells
A living cell has a plasma membrane, a bilayer of lipids that separates the aqueous solution inside the cell called the cytoplasm from the outside environment.
Furthermore, a living cell possesses genetic information...
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Classification of Epithelial Tissues: Overview01:22

Classification of Epithelial Tissues: Overview

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Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and thin), cuboidal (square-like, as wide as it is tall), or columnar (rectangular, taller than it is wide). Additionally, the nucleus shape helps identify the type of epithelial cells. Squamous cells have flattened disc-shaped nuclei, cuboidal cells have spherical nuclei, and columnar cells have elongated nuclei.
Based on the number of cell layers,...
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Classification of Leukocytes01:30

Classification of Leukocytes

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Leukocytes are classified into two groups based on the presence or absence of cytoplasmic granules. Granular leukocytes, which contain granules, belong to the myeloid lineage and are divided into three subtypes: neutrophils, eosinophils, and basophils. These cells are roughly spherical and characterized by the granules in their cytoplasm.
Neutrophils are the most abundant type of granular leukocytes, comprising 50-70% of all leukocytes. They feature small, evenly distributed granules and a...
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Animal and Plant Cell Structure01:30

Animal and Plant Cell Structure

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Animal and plant cells not only differ in their structure, function, and mode of nutrition but also in how they reproduce, specialize, and organize into complex structures.
Cell Division
Though both plant and animal cells divide by mitosis (for non-gametic cells) and meiosis (for gametic cells), they differ in the specifics of this process. Unlike animal cells, plant cells lack centrosomes — an organelle responsible for organizing the spindle fibers and segregating the chromosomes during...
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Cellular Differentiation00:57

Cellular Differentiation

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How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
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Multimodal characterization of variation in neuronal types in the mouse basal ganglia.

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Video Experimental Relacionado

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Discrimination and Characterization of Heterocellular Populations Using Quantitative Imaging Techniques
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¿Qué es un tipo de célula y cómo definirlo?

Hongkui Zeng1

  • 1Allen Institute for Brain Science, Seattle, WA 98109, USA.

Cell
|July 22, 2022
PubMed
Resumen

Comprender los tipos de células, las unidades básicas del organismo, es complejo debido a sus diversas propiedades. Esta revisión explora su evolución, clasificación y función, proponiendo un marco para estudiar los cambios celulares en la salud y la enfermedad.

Área de la Ciencia:

  • * Biología del desarrollo evolutivo
  • * Biología celular y molecular
  • * Neurociencia

Sus antecedentes:

  • * Los tipos de células son fundamentales para la función del organismo, pero son difíciles de definir y categorizar.
  • * La diversidad fenotípica a través de múltiples niveles complica la clasificación del tipo de célula.
  • * La comprensión de los tipos de células es crucial para descifrar la complejidad del organismo.

Objetivo del estudio:

  • * Proporcionar una visión general de los principios del tipo de célula en la evolución y el desarrollo.
  • * Discutir los métodos para la caracterización y clasificación de los tipos de células.
  • * Explorar la contribución de los tipos de células a la función del organismo, utilizando el cerebro de los mamíferos como modelo.

Principales métodos:

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  • * Revisión de la literatura sobre los principios de la biología evolutiva y del desarrollo.
  • * Análisis de los métodos de caracterización y clasificación de los tipos de células.
  • * Estudio de caso centrado en tipos de células cerebrales de mamíferos.

Principales resultados:

  • * Principios establecidos de la evolución y el desarrollo del tipo celular.
  • * Resumen de las metodologías actuales para la identificación y categorización de tipos celulares.
  • * Se ha demostrado el papel de los tipos de células en la función cerebral de los mamíferos.

Conclusiones:

  • * Se necesita un marco conceptual y una base de conocimientos para los tipos de células.
  • * Este marco facilitará la comprensión de los cambios celulares dinámicos en la salud y la enfermedad.
  • * Se requiere más investigación para construir una base de conocimientos completa sobre el tipo de célula.