Not every organism need organs.Unicellular organisms do not have any way.
All the living organisms in the water died when I added to much bleach.
is all part of an organ
No. Organ systems only develop in larger, complex organisms. E.g. amoeba, a single celled organism, is small enough that all its needs can be obtained by the relevant organelles through diffusion. A dog, a large multi-cellular organisms, needs a system to deliver its requirements to the necessary tissues .
No, because if you have a single celled organism, you don't have enough cells to make a tissue, so you won't have enough tissue to make organs, and you won't have any organs to create an organ system.
No. Single celled organisms such as amoeba obviously don't have them. Slightly more complex organisms such as sponges don't have organs or organ systems though they might be said to have tissues.
From wikipedia.org Organs exist in all higher biological organisms, in particular they are not restricted to animals, but can also be identified in plants. In single-cell organisms like bacteria, the functional analogues of organs are called organelles.
All organisms need oxygen to live.
yes we have organ and we are organisms
organ is bigger
The excretory organ of organisms. In human it is kidney
another word for hearing organ
do all living organisms need your body system to survive