Related Experiment Video
Updated: Feb 8, 2026
09:10
Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging
Published on: January 30, 2026
260
A Cell Size Theory of Aging.
Krushna C Patra1, Nabeel Bardeesy1
1Center for Cancer Research, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Medical School, Boston, MA 02115, USA.
Developmental Cell
|June 20, 2018
Summary
Animal longevity is linked to pancreatic growth strategies. Short-lived species grow larger pancreatic cells, while long-lived animals increase cell number, revealing distinct developmental pathways influencing lifespan.
Area of Science:
- Comparative biology
- Developmental biology
- Physiology
Background:
- Factors influencing animal longevity remain incompletely understood.
- Postnatal organ development plays a crucial role in physiological function and lifespan.
Purpose of the Study:
- To investigate distinct postnatal pancreatic growth strategies across mammalian species.
- To determine the correlation between pancreatic development patterns and animal lifespan.
Main Methods:
- Comparative analysis of pancreatic growth in various mammalian species.
- Histological examination of pancreatic tissue to assess cell size and number.
- Correlation analysis between pancreatic morphology and known species lifespans.
Main Results:
- Mammalian species exhibit divergent strategies for postnatal pancreatic growth.
- Short-lived species are characterized by an increase in pancreatic cell size.
- Long-lived species demonstrate an increase in pancreatic cell number during postnatal development.
Conclusions:
- Distinct postnatal pancreatic growth mechanisms are associated with species-specific longevity.
- Pancreatic development strategy is a potential determinant of mammalian lifespan.
Related Concept Videos
02:43Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision
37.9K
The ideal-gas equation, which is empirical, describes the behavior of gases by establishing relationships between their macroscopic properties. For example, Charles’ law states that volume and temperature are directly related. Gases, therefore, expand when heated at constant pressure. Although gas laws explain how the macroscopic properties change relative to one another, it does not explain the rationale behind it.
37.9K
01:22Cell Size
129.2K
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
129.2K
02:35Band Theory
17.3K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.3K
02:31Scientific Laws and Theories
89.1K
Scientific Laws
89.1K
00:56Attribution Theory
13.8K
Behavior is a product of both the situation (e.g., cultural influences, social roles, and the presence of bystanders) and of the person (e.g., personality characteristics). Subfields of psychology tend to focus on one influence or behavior over others. Situationism is the view that our behavior and actions are determined by our immediate environment and surroundings. In contrast, dispositionism holds that our behavior is determined by internal factors (Heider, 1958).
13.8K
02:59The Atomic Theory of Matter
129.3K
The earliest recorded discussion of the basic structure of matter comes from ancient Greek philosophers. Leucippus and Democritus argued that all matter was composed of small, finite particles that they called atomos, meaning “indivisible.” Later, Aristotle and others came to the conclusion that matter consisted of various combinations of the four “elements” — fire, earth, air, and water — and could be infinitely divided. Interestingly, these philosophers...
129.3K