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Related Concept Videos

The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
Renewal of Skin Epidermal Stem Cells01:12

Renewal of Skin Epidermal Stem Cells

The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...
Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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Related Experiment Videos

Skin aging.

Neira Puizina-Ivić1

  • 1Department of Dermatovenerology, Split Clinical Hospital Center, Soltanska 1, 21 000 Split, Croatia. neira@radogost.com

Acta Dermatovenerologica Alpina, Pannonica, Et Adriatica
|August 19, 2008
PubMed
Summary
This summary is machine-generated.

Skin aging results from intrinsic and extrinsic factors, including genetics and environmental damage. Protecting skin with sunscreens and antioxidants can reduce aging signs, alongside a healthy diet and exercise.

Related Experiment Videos

Area of Science:

  • Dermatology
  • Cellular Biology
  • Aging Research

Background:

  • Skin aging is influenced by intrinsic (genetics, time) and extrinsic (environmental) factors.
  • Extrinsic aging involves photodamage from UV exposure, pollution, and lifestyle choices.
  • Intrinsic aging manifests as thinning skin and expression lines.

Purpose of the Study:

  • To differentiate between intrinsic and extrinsic skin aging processes.
  • To identify key environmental and genetic contributors to skin aging.
  • To outline protective and therapeutic strategies against skin aging.

Main Methods:

  • Review of scientific literature on skin aging mechanisms.
  • Analysis of cellular damage and mutation processes.
  • Identification of environmental factors and genetic predispositions.

Main Results:

  • Extrinsic aging presents with wrinkles, pigmented lesions, and actinic keratoses due to photodamage.
  • Intrinsic aging leads to thinning skin and pronounced expression lines.
  • Antioxidants (Vitamins E, C, CoQ10) and retinoids show anti-aging potential.

Conclusions:

  • Sun protection (sunscreens, UV avoidance) is crucial for preventing extrinsic aging.
  • Antioxidant-rich diets and supplements can mitigate aging signs.
  • Lifestyle modifications, including diet and exercise, support skin health.