- The liquid component found within the cytoplasm is called the cytosol.
- The cytoplasm of a cell consists of all the contents within the cell membrane, excluding the nucleus.
- It is composed of the cytosol (the fluid portion) and various organelles suspended within it.

- The cytosol is a gel-like, aqueous solution that contains water, dissolved ions, small molecules, and large water-soluble molecules such as proteins.
- It serves as the medium in which many cellular processes occur, including metabolism, signal transduction, and molecular transport.

To clarify the other options:
- Nucleoplasm is the fluid found inside the nucleus, not the cytoplasm.
- Lysosomal fluid refers to the digestive enzymes and aqueous environment within lysosomes.
- Mitochondrial matrix is the innermost compartment of mitochondria, containing enzymes for cellular respiration.

Reference: Medical Physiology, Volume 1, Chapter 3, Page 45