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The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...
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Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
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Related Experiment Video

Updated: Dec 29, 2025

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The fat brain.

Jorge Montesinos1, Cristina Guardia-Laguarta, Estela Area-Gomez

  • 1Department of Neurology, Columbia University Medical Center, New York, New York, USA.

Current Opinion in Clinical Nutrition and Metabolic Care
|February 1, 2020
PubMed
Summary

Lipids play vital roles in brain function and synaptic plasticity. Understanding lipid homeostasis is key to unraveling neurological disorders and developing new treatments.

Area of Science:

  • Neuroscience
  • Biochemistry
  • Molecular Biology

Background:

  • Lipids are fundamental components of the brain, yet their precise roles in the central nervous system remain largely unexplored.
  • Maintaining proper lipid homeostasis is critical for neuronal function and synaptic plasticity.

Purpose of the Study:

  • To elucidate the diverse functions of lipids in the brain.
  • To highlight emerging concepts regarding lipid homeostasis's influence on synaptic transmission regulation.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of novel findings in lipid research.
  • Exploration of advanced analytical techniques for lipid profiling.

Main Results:

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  • Lipid homeostasis is crucial for neuronal function and synaptic plasticity.
  • Advances in analytical methods enable deeper understanding of lipid roles.
  • Altered lipid pathways may contribute to neurodegeneration pathogenesis.

Conclusions:

  • Identifying molecular mechanisms of lipid-mediated neuronal transmission is a key frontier in neuroscience.
  • Further research into lipid roles is essential for understanding brain function and neurological disorders.