The microscopic structure of the cell is composed of various organelles that work together to maintain the cell's functions. These organelles can be categorized into two types: membrane-bound organelles and non-membrane-bound organelles.

Membrane-bound Organelles
1. Nucleus: It is the control center of the cell that contains genetic material in the form of DNA. It regulates the cell's growth, metabolism, and reproduction.
2. Endoplasmic Reticulum: It is a network of membranes that transport proteins and lipids throughout the cell. It is of two types: rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER).
3. Golgi Apparatus: It is responsible for sorting, modifying, and packaging proteins and lipids for transport to their final destinations.
4. Mitochondria: They are the powerhouses of the cell that produce energy in the form of ATP.
5. Lysosomes: They are the digestive organelles that break down waste materials and cellular debris.

Non-membrane-bound Organelles
1. Ribosomes: They are responsible for protein synthesis and can be found either in the cytoplasm or attached to the RER.
2. Cytoskeleton: It is the network of protein fibers that provides structural support and helps in cell movement and division.
3. Centrosomes: They are composed of two centrioles and play a role in cell division.
4. Vacuoles: They are the storage organelles that contain various substances such as water, ions, and nutrients.

In conclusion, the microscopic structure of the cell is composed of various organelles that work together to maintain the cell's functions. These organelles can be categorized into membrane-bound and non-membrane-bound organelles, each with their specialized functions.

They were composed of box-like compartments, forming a honeycomb structure. Cell organelles are found embedded in the cytoplasm. These are smaller in size and bounded by plasma membrane.