The kidneys ...
Your skin.
The small intestine.
The largest organ in the human body would be the skin.
a group of cells is called a tissue
cells < tissue < organs <organ systems
FYI~ typically marijuana cannot be acurately distinguished from the chemical composite of melanin for the truly melaninated. That's a hook for those suffering from Hoesa 4:6: if biblical recall serves off the top of my head. For accuracy in testing a vast examination of those melinated reactions to differing inductions would have to be preformed. Melanin is a powerful chemical element of "the ignored realms," subdefined as "brain sand. tossed aside as insignifigant despite the fact that it premeiates every ogran tissue and chemical component of bodily activity, as instructed by the pineal gland of the brain. That's what gives "Rhythm to Reason" Thus so many "BLACK" are railroaded in this falenious test procedure, because melanine is like a magnet it attracts certain particles that flows within the blood that has to give reason to "scientific" credences... as recovered by this SNAP scientist... And the Pope knows this to be a valid assertion . Marijuana in the blood is always a question if you are melaninated!
In a single-celled organism (Unicellular organism), one cell carries out all the functions of the body. For example, transporting nutrients, excretion ,etc are performed by the single cell which makes up the organism. In a multi-cellular organism, on the other hand, various cells arrange or group themselves to perform certain or particular functions. They are specialized to perform any one type of function. This is what makes up tissues, organs and ogran systems in a multi-cellular organism. One group of cells performs one function. For example, blood corpuscles are of different types. One type (WBCs) helps in fighting diseases, another type (RBCs) will help in transporting oxygen to various cells and so on.