Certainly, sharks have gills that absorb oxygen from sea water and release carbon di oxide. Sharks must keep moving even when sleeping to keep water flowing through their gills.
unicellular organisms are the organisms which have one cell it is also known as a single-celled organism. example: Amoeba, Bacteria, Euglena, Paramecium, Cyanobacteria etc.
Multicellular organisms are organisms that consist of more than one cell. example man, bird, panda, parrot etc.
cells are made of different organelles.
Honey reduces cortisol levels by reacting with the reagent IgA to release glucose. With too much glucose in the blood stream, cortisol is not needed in order to stimulate further glucose release.