Cytoplasm, and cytoskeleton

Cytoplasmic inclusions

Aggregates of chemicals such as lipid droplets, melanin.

Microfilaments

Aka actin filaments. Structure, support for microvilli, contracility, movement.

Microtubules

Are hollow, and made of tubulin. Are internal scaffold, transport, cell division.

Cytoplasm

Cellular material outside the nucleus but inside the plasma membrane. It is composed of the cytosol, cytoskeleton, cytoplasmic inclusions, and organelles.

Intermediate filaments

Provides mechanical strength to cells.

Cytoskeleton

Supports the cell and holds the nucleus, and other organelles in place. It must allow for movements of cilia. Consists of three groups of proteins: the microtubles, actin filaments, and intermediate filaments.

Cytosol

The fluid portion. Dissolved molecules (ions in water) and colloid (proteins in water)