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Free-falling Bodies: Example

Free-falling Bodies: Example

An object falling without any air resistance under the influence of gravitational force is said to be in free-fall. For free-falling bodies, the acceleration due to gravity is constant, irrespective of their mass. Free-fall is experienced not only by objects falling downward, but also by all objects whose motion is influenced by gravitational force alone. The dynamics of free-fall motion can be calculated using kinematic equations of motion, since free-fall acceleration is constant.
The...

Skeleton and Calcium Homeostasis

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.

Carbon Skeletons

Carbon Skeletons

Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...

Free-falling Bodies: Introduction

Free-falling Bodies: Introduction

All objects, neglecting air resistance, fall with the same acceleration towards the Earth's center due to the force exerted by the Earth's gravity. This experimentally determined fact is unexpected because we are so accustomed to the effects of air resistance and friction that we expect light objects to fall slower than heavier ones. People believed that a heavier object had a greater acceleration when falling until Galileo Galilei (1564–1642) proved otherwise. We now know this is not the case.

Necrosis

Necrosis

Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
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Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...

Autophagic Cell Death

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Related Experiment Video

Updated: Jun 20, 2026

Vacuum-Sealed Hot Water Bath Immersion for the Preparation of Anatomical and Surgical Cadaveric Bone Models

Vacuum-Sealed Hot Water Bath Immersion for the Preparation of Anatomical and Surgical Cadaveric Bone Models

Published on: December 2, 2022

The mummified corpse in a domestic setting.

Carlo P Campobasso¹, Rosa Falamingo, Ignazio Grattagliano

¹Department of Health Sciences, University of Molise, Campobasso, Italy. cpcarlo@yahoo.com

The American Journal of Forensic Medicine and Pathology

|August 22, 2009

Summary

A mummified body was discovered 7 years after disappearance, highlighting the critical issue of elderly isolation and delayed recovery in urban settings. This case underscores the need for better social support systems.

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Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face

Published on: January 7, 2019

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Last Updated: Jun 20, 2026

Vacuum-Sealed Hot Water Bath Immersion for the Preparation of Anatomical and Surgical Cadaveric Bone Models

Vacuum-Sealed Hot Water Bath Immersion for the Preparation of Anatomical and Surgical Cadaveric Bone Models

Published on: December 2, 2022

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face

Published on: January 7, 2019

Area of Science:

Forensic Pathology
Gerontology

Background:

Case study of a mummified body found in an urban apartment 7 years after disappearance.
Highlights the phenomenon of delayed recovery and unnoticed deaths among the elderly living alone.

Observation:

An 86-year-old man with coronary atherosclerosis was found mummified in his apartment.
The body was discovered due to unpaid utility and condominium bills.
Mummification was attributed to rapid dehydration, with minimal insect activity and absorption of fluids by furnishings.

Findings:

Cause of death was undetermined but presumed natural.
Identification was confirmed via dental records.
Histological examination revealed autolysis, and toxicology showed only decompositional products.

Implications:

Underscores the social isolation of the elderly, even in urban environments.
Reveals deficiencies in family support and social/neighborly relationships.
Suggests a need for proactive welfare checks and support for vulnerable, isolated individuals.