Cytoplasm

The living contents of Eukaryotic cells are divided into nucleus and cytoplasm. The cytoplasm and nuclei together forms into the Protoplasm.

Cytoplasm is an aqueous substance. It contains variety of cell organelles such as mitochondria, ribosomes, endoplasmic reticulum, chloroplast etc. And also contain insoluble waste storage products etc.

The soluble part of the cytoplasm forms the ground substance between cell organelles. It contains a skeleton of fibrous but otherwise appear and structureless in the electron microscope.

It consists of 90% water and forms solution. Solution contains all the fundamental biochemical of life.

Some of these are ions, small molecules and large molecules.

Sodium, Potassium are some examples for ions in cytoplasm.

Salts, sugars, amino acids, fatty acids, nucleotides, vitamins and dissolved gases are examples for small molecules in cytoplasm.

Also proteins are large molecules finding inside the cytoplasm which form colloidal solution.

According to this explanation ground substance is acting as a store of vital chemicals.

Also, it is the site of certain metabolic Pathways.

                 Ex:- glycolysis

Some organelles move inside the cytoplasm such as mitochondria move about.