The material between cell membrane and nucleus is called cytoplasm.
The cytoplasm is a jelly-like substance that fills the space between the cell membrane and the nucleus. It plays a crucial role in various cellular activities. Here are some key points about the cytoplasm:
1. Composition: The cytoplasm is composed of water, proteins, salts, and various organic molecules. It also contains organelles such as mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes.
2. Functions: The cytoplasm performs several essential functions in the cell, including:
- Cellular metabolism: Many metabolic reactions occur in the cytoplasm, such as glycolysis, protein synthesis, and lipid metabolism.

- Transport: It serves as a medium for the transport of molecules and organelles within the cell. It also facilitates the movement of nutrients and waste products across the cell membrane.

- Support and shape: The cytoplasm provides structural support to the cell and helps maintain its shape.

- Storage: It acts as a storage site for various substances, including nutrients, ions, and waste products.

- Cellular communication: The cytoplasm is involved in intracellular signaling and communication processes, allowing cells to respond to external stimuli and coordinate their activities.

3. Organization: The cytoplasm is not a homogeneous mixture but is organized into different regions or compartments. These include the cytosol (the liquid portion), the cytoskeleton (protein fibers that provide structural support), and various organelles suspended within the cytosol.
In summary, the cytoplasm is the material between the cell membrane and the nucleus. It is a complex and dynamic environment that supports various cellular processes and is essential for the overall functioning of the cell.