EVERYDAY SCIENCE

Detailed explanation-1: -Gills (evaginated gas exchangers) are the primordial respiratory organs: they are the archetypal water breathing organs. Lungs (invaginated gas exchangers) are the model air breathing organs.

Detailed explanation-2: -An organ used for breathing in many water-dwelling animals, including most fish and many arthropods. Gills generally have a large surface area and are filled with blood; gas exchange occurs by diffusion across the surface area of the gill as oxygen passes into the blood and carbon dioxide passes out of the animal.

Detailed explanation-3: -Your lungs and respiratory system automatically perform this vital process, called gas exchange. In addition to gas exchange, your respiratory system performs other roles important to breathing. These include: Bringing air to the proper body temperature and moisturizing it to the right humidity level.

Detailed explanation-4: -Most gills are made up of arches, filaments, and rakers. The arches give the structure of the gills and are where the filaments are attached. The filaments are covered with small blood vessels called capillaries. This is where the gas exchange between oxygen and carbon dioxide occurs.

Detailed explanation-5: -Gills are the respiratory organs in aquatic organisms such as fishes. Lungs are the respiratory organs of many land animals such as lizards, dogs, frogs etc. Skin is the respiratory organ in earthworm and amphibians such as frog.