Name: The Shark Immune System | When Sharks Attack
Uploaded: 2020-11-09T18:15:12.000Z
Duration: 3 min 19 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

NARRATOR: As experts begin to search for other explanations,

in the months following the June 2012 attacks.

We had some dolphins that washed up already dead.

NARRATOR: In fact, it turns out that over the course of 2013,

a total of 48 dolphins are found dead on South Carolina beaches.

Researchers concluded the dolphins were inflicted

This deadly disease suppresses the dolphin's immune system

The result is a bizarre shift in behavior.

swimming in strange patterns, almost like they are drunk.

So in 2012, could the sharks of Myrtle Beach

According to Dr. Dan Huber, it comes down

the first line of defense against any type

So the skin is part of the immune system, essentially.

Looking at a section of shark skin which shows what

are basically little teeth that make up the scales of a shark.

NARRATOR: The denticles perform a unique function

NARRATOR: And there's also another organ that helps

The liver produces a chemical compound called squalamine.

The squalamine is dispersed inside the shark's cells.

If a virus invades the cells, the squalamine

prevents it from multiplying so the virus doesn't spread.

Scientists are even testing squalamine to fight cancer

Any suggestion that the sharks could have become ill due