for poo.
Gills would be respiration
Fish have gills to breathe in the water. they swim in the water and are adapted :D :D :D
The gills of a dogfish shark are highly adapted for respiration, featuring numerous filaments and lamellae that increase the surface area for gas exchange. This structure allows for efficient extraction of oxygen from water as it flows over the gills. Additionally, the gills are located in a series of pouches, which enhances water flow and maximizes oxygen absorption, ensuring that the shark can meet its metabolic needs while swimming.
they have gills
By gills .
Lungs and Gills are both used for external respiration
The Gills
salmon
The incurrent siphon of a clam is adapted to bring in water, along with food particles and oxygen, from the surrounding environment. This enables the clam to filter out and extract nutrients from the water using its gills for respiration and feeding.
gills
it uses its gills
Between the lungs/gills and the environment