What is meant by the Endomembrane system? Which cell organelles are included in it? Provide brief information.

(N/A) $\Rightarrow$ Each of the membranous organelles is distinct in terms of its structure and function,but many of these are considered together as an endomembrane system because their functions are coordinated.
$\Rightarrow$ The endomembrane system includes the endoplasmic reticulum $(ER)$,Golgi complex,lysosomes,and vacuoles.
$\Rightarrow$ The functions of the mitochondria,chloroplasts,and peroxisomes are not coordinated with the endomembrane system,hence they are not included in it.