a fully differentiated structural and functional unit in an animal that is specialized for some particular function
This is the classical definition of an organ.
an organ is a group of different tissues working together to make an organ for example a ears lungs, heart
The heart can be defined as the organ that pumps blood.
An organ for aerial respiration; -- commonly in the plural.
The fleshy, movable, muscular organ, attached in most vertebrates to the floor of the mouth, that is the principal organ of taste.
Yes, cause leaf is made up of groups of different kinds of cells as the definition of organ suggests.
A disease is when you have a body malfunction or an organ is not working right.
A collection of tissue that carry out a specialized function of the body.
Tissue is a group of organ joined together.
Colon.
A gland is a cell, group of cells, or organ producing a secretion.
This is the classical definition of an organ.