Gills are composed of thousands of filaments which are covered in lamellae (only a few cells thick and contain blood capillaries). This creates a large surface area and a short distance for gas exchange.
The Gills
in their gills.
Gills
Carbon Dioxide
carbon dioxide
Fish breathe through their gills. There are usually gills on either side of the pharynx. Gills have thread-like structures (filaments). These filaments exchange the oxygen and carbon dioxide.
Like all fish- through their gills.
to protect the gills
Across the alveoli and capillaries.
Fish breathe through their gills. There are usually gills on either side of the pharynx. Gills have thread-like structures (filaments). These filaments exchange the oxygen and carbon dioxide.
either gills or stomata
Most fish use gills for gas exchange instead of lungs