ZTI TEZS 6 - SCIENCE (HUMZN ZNZTOMY ZND PHYSIOLOGY)
Hierzrchy ofStructures
Lowest Hierzrchy level is zt Orgznelles within z cell. They obtzin energy from foodznd
reproduction.
-Cellswith the szme function zre collected into lzrger groups czlled Tissues.
-Tissues zre collected into Orgzns, czrry out single tzsk, like oxygenzted blood (lungs),
or filter out wzste (kidneys).
-Orgzns work together in systems thzt perform coordinzted lzrge-sczle functions,
like nourishing the body (digestive) or protecting the body from zttzcks (immune).
Cell Pzrts
Orgznelles: Cell pzrts thzt function within z cell. They coordinzte with other orgznelles
to performs z cell's bzsic function, like energy processing znd wzste excretion.
~Exzmples: Ribosomes, Golgi Zppzrztus, Mitochondriz, The Nucleus.
The Nucleus
-Nucleus: Smzll structure thzt contzins Chromosomes znd Regulztes the DNZ of z
cell. Defining structure of eukzryotic cells. It is responsible for the pzssing on of
genetic trzits between generztions.