How does the fish get its oxygen and how carbon dioxide is removed?

Fish breathe using gills, which are specialised organs that extract oxygen from water. The gills are located on either side of the fish's head and are made up of thin filaments that are covered in tiny blood vessels. Water passes over the gills, and the oxygen in the water diffuses across the blood vessels and into the bloodstream. At the same time, carbon dioxide diffuses out of the bloodstream and into the water.

The process of respiration in fish

The process of respiration in fish begins with the mouth. Fish take water into their mouths and then force it out through their gills. As the water passes over the gills, the oxygen in the water diffuses across the blood vessels and into the bloodstream. At the same time, carbon dioxide diffuses out of the bloodstream and into the water.

The oxygen-rich blood is then pumped by the heart to the rest of the body. The carbon dioxide-rich blood is pumped to the gills, where the carbon dioxide diffuses out of the bloodstream and into the water.

How is carbon dioxide removed from fish?

Carbon dioxide is removed from fish through the gills. As the water passes over the gills, the carbon dioxide in the bloodstream diffuses across the blood vessels and into the water.

The importance of gills

Gills are essential for fish survival. Without gills, fish would not be able to extract oxygen from water and would quickly suffocate. Gills also play a role in the regulation of body temperature and in the excretion of waste products.