Biology videos

Articles

• histones
  16 July 2003

  histone proteins

• acute inflammation
  1 June 2004

  Digital cases
  Case 25 (HPC:25) : Acute appendicitis
  Case 94 (HPC:94) : Acute appendicitis
  Case 13 (HPC:13) : Acute synovitis
  Definition: Acute inflammation is a rapid response to an injurious agent that serves to deliver mediators of host defense-leukocytes and plasma proteins-to the site of injury.
  Types - Lesional patterns
  acute inflammation
  congestive inflammation
  cellular acute inflammation
  suppurative inflammation / suppuration
  abcess / abcesses / abcedation (...)

• diapedesis
  30 April 2004

  leukocytic transmigration

• abscess
  9 June 2004

  abcesses
  Definition: Abscesses are localized collections of purulent inflammatory tissue caused by suppuration buried in a tissue, an organ, or a confined space. They are produced by deep seeding of pyogenic bacteria into a tissue.
  Abscesses have a central region that appears as a mass of necrotic leukocytes and tissue cells. There is usually a zone of preserved neutrophils around this necrotic focus, and outside this region vascular dilation and parenchymal and fibroblastic proliferation (...)

• DNA repair
  13 July 2003

  DNA reparation, DNA damage response, gene repair

• teratoma
  10 March 2004

  teratomas
  Definition: Teratomas are neoplasms comprised of mixed elements derived from the three germ cell layers.
  Images
  Gastric teratoma in a 1yo male
  https://twitter.com/DraEosina/status/817663085376901121
  A teratoma is generally defined as a tumor arising from pluripotent cells, and it is precisely the heterogeneity of tissues present in such a tumor that best characterizes it; it is also commonly accepted that a teratoma must contain derivatives of more than one blastodermic (...)

• chromatin
  13 July 2003

  See also : chromatin appearance / chromatin anomalies
  Definition: Chromatin is the DNA/protein/RNA complex extracted from eukaryotic lysed interphase nuclei. Just which of the multitudinous substances present in a nucleus will constitute a part of the extracted material will depend in part on the technique each researcher uses. Furthermore, the composition and properties of chromatin vary from one cell type to the another, during development of a specific cell type, and at different stages (...)

• neurulation
  29 October 2003

  Neurulation is a fundamental embryonic process that leads to the development of the neural tube, which is the precursor of the brain and spinal cord.
  Building a neural tube is an extremely complex phenomenon where cells need to change in shape, migrate and differentiate to form a hollow tube from a flat sheet of thickened epithelial cells (the neural plate).
  Neurulation occurs through two distinct phases: primary neurulation (weeks 3–4) that leads to the formation of the brain and most of (...)

• embryo
  21 May 2004

  human embryo

• urinary system
  19 February 2004

  Components
  kidneys
  ureteres
  vesical bladder
  urethra
  Pathology (nephropathology and uropathology)
  urinary malformations (developmental anomalies of urinary system)
  urinary lesions
  urinary diseases
  urinary tumors
  Animations
  Development of the female urogenital system
  Production: Maryam Razmpoosh, Alexande Oligny, Luc Oligny; Department of Pathology, CHU Sainte-Justine, Université de Montréal, QC.
  Development of the male urogenital system
  Production: Maryam Razmpoosh, (...)

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