Student Article
Birds and Reptiles Cry Tears Like Humans
Sodium (noun): A type of salt found in tears.
Calcium (noun): A mineral that helps keep bones and teeth strong.
Protein (noun): A nutrient that helps build and repair body tissues.
Electrolytes (noun): Minerals in the body that help keep it working properly.
Urea (noun): A waste product found in tears and urine.
Adapted (verb): Changed in order to survive in a new environment.
Researchers have discovered that birds and reptiles cry tears similar to humans. These tears contain substances like sodium, calcium, and proteins, which are important for eye health.
How did scientists find this out?
A team led by Professor Arianne Oriá from Brazil's Federal University of Bahia collected tear samples from various birds and reptiles, including macaws, owls, hawks, caimans, tortoises, and sea turtles. They used special strips to gather the tears and then analyzed them.
What did they discover?
The scientists found that bird and reptile tears have similar amounts of electrolytes as human tears. However, some animals, like owls and sea turtles, had higher levels of urea and protein. When the tears dried, they formed different crystal patterns, which can help detect eye diseases.
Why is this important?
Understanding the similarities and differences in tears can help scientists develop better eye treatments for both animals and humans. It also provides insights into how these species have evolved and adapted to their environments.
© Alice Lipscombe-Southwell / Our Media
Sodium (noun): A type of salt found in tears.
Calcium (noun): A mineral that helps keep bones and teeth strong.
Protein (noun): A nutrient that helps build and repair body tissues.
Electrolytes (noun): Minerals in the body that help keep it working properly.
Urea (noun): A waste product found in tears and urine.
Adapted (verb): Changed in order to survive in a new environment.