How Do Spiders Hold Their Breath?
WouterThe myth that spiders can hold their breath is a common belief. Unfortunately, this is just a myth. Spiders are no more capable of holding their breath than insects.
However, spiders do have a respiratory system that is unique to them. Most arachnids have two types of breathing apparatus. These include trachea and book lungs.
Trachea are a network of narrow tubes lined with a hard substance known as chitin. These tubes open directly to the surface through tiny holes. They are most commonly found in spiders.
Arachnids can also use their body hair to create a film that can exchange oxygen with water. In fact, some spiders have an air bubble inside their abdomens that can be used to breathe underwater.
In fact, most spiders can hold their breath for up to 24 hours. Some even do so without drowning.
While it is true that spiders cannot pump air into their lungs, some have a trick up their sleeves. Instead of relying on their lungs, spiders create large bubbles and pull prey into them. This process is called passive diffusion.
Another trick that spiders have is a silken web. This allows the spider to release carbon dioxide and oxygen into the air around it.
In addition, spiders can also take in air through their skin. Some species have gills, but these are uncommon.
For a long time, scientists didn’t know how the iconic diving bell spider could stay under water. The spider created an “air bubble” in the shape of a bell, using its body hairs to trap the air inside.
