Book lungs
their skin. they also have lungs but they can respire through their skin.
Insects do not have respiratory pigments in their blood. They are able to survive with low oxygen in the blood because some can respire through pores on the skin.
the respiratory system in a baby is not well developed and they do respire through mouth too, and so they keep their mouth open.
Fish respire in water through gas exchange in their gills.
Through the skin.
They respire through out the day.
Insects, such as spiders and scorpions, do not have blood but utilize a network of tubular structures called tracheae to respire. These tracheae deliver oxygen directly to the tissues of the body through tiny openings called spiracles. By relying on this system, insects can efficiently exchange gases without the need for a circulatory system.
they breath through their nostrils.
Penguins have a respiratory system similar to other birds. They breathe air into their lungs, where oxygen is extracted and carbon dioxide is expelled. Penguins can dive underwater for extended periods of time due to adaptations such as increased oxygen storage capacity and efficient use of oxygen in their muscles.
As all living things respire, even toads do respire too. It is just the matter of the way the living things respire. Toads breathe through their skin with whats called cutaneous gas exchange. They also have lungs for when they're out and about, but when in hibernation or submerged in water, they just use their skin. (Did I answer the question?) :D
Insect respiratory system uses a system of internal tubes and sacs through which gases either diffuse or are actively pumped, delivering oxygen directly to tissues that need it via their trachea.
Jellyfish respire through their body surface.