stomata
The structure in the epidermis that gaseous exchange occurs in plants is through the stomata. A stomata is a tiny opening or pore in the epidermis.
Gaseous exchange happens through diffusion.
Gaseous exchange is the movement of oxygen in the body, it takes place in the lungs through diffusion by the alveolar surface. There are millions of alveloi in the lungs, which gives it around 70m2 of exchange surface.
Gaseous exchange occurs through capillaries all over the body to bring oxygen to cells and remove carbon dioxide.
approx 80% is taken in through their root system the rest through gaseous exchange.
Seaweed does not breathe, instead it respires by gaseous exchange through water
Gaseous exchange takes place in numerous alveoli located in the lungs.
haemoglobin present in the RBC helps in gaseous exchange and transport in humans .. where as in plants its through stomata , cuticle , lenticels etc....
Guard cells in epidermis around stomata pores helps in transpiration through stomata and exchange of gases.
stomata
If they dried out they would no longer be able to let gasses pass through them.
The earthworm has no special respiratory organs. Gaseous exchange occurs through moist skin by diifusion.