We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is Cell Regeneration?

By Sandi Johnson
Updated Mar 03, 2024
Our promise to you
The Health Board is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At The Health Board, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Cell regeneration is a biological feature of all living organisms from bacteria to plants and amphibians to mammals. It is the act of renewal, growth, or restoration of cells involved in maturation, wound healing, tissue repair, and similar biological functions. Cellular regeneration in its most extreme form is what allows starfish, flatworms, and lizards to regrow broken limbs, tails, or in the case of flatworms, clone entire body structures for the purpose of reproduction. Humans have certain limited cellular regeneration abilities that allow for the replacement of worn or damaged tissues.

While all organisms, including bacteria, fungi, and yeast, have the biological ability to regenerate cells, the process presents differently in each organism. Maintaining an organism's biological integrity is the primary purpose of cellular regeneration, although some organisms also use cell regeneration as a form of asexual reproduction. For example, yeast propagates and repairs itself through an asexual cell regeneration process known as cell budding. A new cell grows as a nub attached to an old cell, gathering DNA information to reproduce an exact duplicate cell. Upon maturity, the new cell breaks off and becomes independent of its host cell, thus allowing yeast and similar fungi to reproduce, grow, or repair damage.

Certain reptiles and amphibians have the capability for complex cellular regeneration, allowing entire tissue structures to regrow after damage through a process known as autotomy. When an injury occurs or such creatures are in danger from predators, adult cells within tails, fins, and other appendages can separate from the main body, leaving the appendage behind. As part of the creature's natural biochemical process, cells at the edges of such injuries morph back into stem cells, allowing for a cell regeneration process identical to the initial growth and development of the lost appendage.

In humans, cell regeneration presents a slightly different process. Stem cells, the generic cellular building blocks that allow an embryo to eventually form specific organs, tissues, and appendages, are present only in vitro. Once cells develop into mature cells, they cannot revert again to stem cells, as seen in certain reptiles and amphibians. Rather, mature brain cells, skin cells, nerve cells, and other cellular classifications can only split and reproduce like cells, thus limiting cell regeneration in humans.

While limited, cell regeneration in humans plays an important role in development, healing, and tissue repair. Cells in humans naturally die at a rate of billions per day due to either necrosis, the death of cells due to damage or injury, or through apoptosis. Apoptosis is a form of programmed cellular death that allows cells to fragment or otherwise die as part of the normal biochemical process involved in development, growth, and aging. Without some form of cell regeneration, necrosis and apoptosis would eventually result in the destruction of entire organs and tissue regions. Instead, cell regeneration allows the body to grow new cells to replace dead, dying, or otherwise damaged cells by splitting a single healthy cell into two separate, cells.

Although humans retain the ability to regenerate cells based on certain conditions, the ability to completely regenerate entire structures is limited to certain tissues and organs such as the liver and skin. Brain cells, for example, slowly regenerate over time, but a human could not grow a new brain through cell regeneration. Alternatively, the human body can regenerate the liver, provided at least one quarter of the organ remains intact. Likewise, skin can regrow to cover large areas of damage, provided there is a sufficient percentage of skin left from which to replicate new cells.

The Health Board is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.

The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.