{"page":"\n\n
\n
\n
\n
\n
\n\nVideo\n
\n

\nRigor Mortis, Livor Mortis, Pallor Mortis, Algor Mortis: Forensic Science Explains Stages of Death\n

\n
\n
\nGet Free Access for 10 Days!\n
\n
\n
\n
\n
\n
×
\n\n\n
\n\nPublisher:\n\nScience ABC\n\n\n
\n
\nOnce a person dies, their body begins a process of decay. This process can be seen through certain external changes which are called post mortem signs of death. There are 4 postmortem signs of death - pallor mortis, algor mortis, rigor...\nOnce a person dies, their body begins a process of decay. This process can be seen through certain external changes which are called post mortem signs of death. There are 4 postmortem signs of death - pallor mortis, algor mortis, rigor mortis, and livor mortis in this order respectively. All these changes occur in the first 24-48 hours after death. Pallor mortis is the first sign. It is when the skin becomes pale because of lack of blood flow to the skin. Algor mortis is the second sign. It is the change in body temperature post mortem to reach external temperatures. Rigor mortis is the 3rd stage. In this stage all the muscles stiffen because of cellular degradation called autolysis. It is preceded by primary flaccidity where all the muscles relax because the brain does not send the muscles signals to contract. As cellular degradation continues, it sets the onset of a second phase of relaxation called secondary flaccidity. This whole cycle can take for 24 hours. Lastly, livor mortis is the pooling of blood due to gravity that appears as a purple colouration. All these signs are used by forensic experts to determine time of death.\n
\n
\n\n
\n
\n
\n
\n

Resource Details

\n
\n
\n
\n
Curator Rating
\n
\n
\n
\n
\n
\n
Educator Rating
Not yet Rated
\n
\n
\n
\n
\n
Media Length
\n
7:18
\n
\n
\n
\n
\n
Grade
Pre-K - Higher Ed
\n
\n
\n
\n
\n
Subjects
Science
6 more...
\n
\n
\n
\n
\n
Media Type
Instructional Videos
\n
\n
\n
\n
\n
Source:
\n
\nScienceABC\n\n
\n
\n
\n
\n
\n
Date
\n
2019
\n
\n
\n
\n
\n\n
Language
English
\n
\n
\n
\n
\n
Audiences
For Teacher Use
2 more...
\n
\n
\n
\n
\n
Usage Permissions
Fine Print: Educational Use
\n
\n
\n
\n
\n
\n

Additional Materials

\n
\n\nSign in or Join Now
\" data-title=\"Get Full Access\" data-container=\"body\" rel=\"popover\" tabindex=\"0\" href=\"/subscription/new\">Video Transcript\n
\n
\n\nSign in or Join Now
\" data-title=\"Get Full Access\" data-container=\"body\" rel=\"popover\" tabindex=\"0\" href=\"/subscription/new\">Video Preview\n
\n
\n
\n

Concepts

\n
\n
temperature, muscles, time, blood, myosin, death, skin, capillaries, animation
\n
\n\n\n
\n
\n
\n
\n

Additional Tags

\n
\n
rigor mortis, liver mortis, pallor mortis, algor mortis, stages of death, forensic science, forensic science crime scene investigation, what happens during rigor mortis, what causes rigor mortis, why does rigor mortis occur, how to calculate algor mortis, science, curiosity, forensic experts, external conditions, primary flaccidity, heat produced, exact time, time frame, signs, rigamortis, determining, heart, estimate, relax, starts, lividity, body, watching, expert, corpse, 30 minutes, means, hour, sign, decrease
\n
\n\n\n
\n
\n
\n
\n

Classroom Considerations

\n
Best For: Explaining a topic
Video is ad-free
\n
\n
\n

Educator Ratings

\n
\n
\n
\n
\n
\n\nShow resource details\n
\n
\n\" data-title=\"Get Full Access\" data-container=\"body\" rel=\"popover\" tabindex=\"0\" aria-label=\"Play video: Rigor Mortis, Livor Mortis, Pallor Mortis, Algor Mortis: Forensic Science Explains Stages of Death\" href=\"/subscription/new\">\"Rigor\n\n
\n
\n
\n\n\n\n"}