How does sharks respiration?

Sharks breathe through their gills. The gills are located on either side of the shark's head and are made up of a series of thin, feathery filaments. The filaments are covered in tiny blood vessels, which allow the shark to absorb oxygen from the water.

When a shark breathes, it opens its mouth and takes in water. The water passes over the gills, and the oxygen in the water is absorbed by the blood vessels in the filaments. The water then exits the shark's body through its spiracles, which are small openings located behind the eyes.

Sharks have to keep moving in order to breathe. This is because the water that flows over their gills needs to be oxygenated. If a shark stops moving, the water around it will become deoxygenated, and the shark will suffocate.

Some sharks, such as the great white shark, have a special organ called a ram jet. The ram jet helps the shark to breathe by forcing water over its gills. This allows the shark to swim at high speeds without having to stop to breathe.