Organism= Human, Plants, Fungi
Organ system=Circulation system, Reproductive system, Digestive system
Organ=Heart, Lungs, Uterus
Tissue=Muscle, Grey matter, Bone
Cell=Nerve, Stem, White blood cell
Organelle= Mitochondria, Ribosomes, Nucleus
Organism = An individual animal, plant, or single-celled life form.
Organ system= A group of organs that work together to perform one or more functions. Each does a certain job and is mad up of tissues.
Organ = Similar tissues working together to form a function.
Tissue = made up of specialised cells performing a specific function
Cell = the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.
Organelle = an organelle is a specialised sub unit within a cell that has a specific function, in which their function is vital for the cell to live. Individual organelles are usually separately enclosed within their own lipid bi-layers, but cannot be bound by one.