Germinal epithelial cells and cells of Sertoli are the two types of cells seen in the seminiferous tubule area.

Germinal epithelial cells:
- Germinal epithelial cells, also known as spermatogonia, are the cells responsible for the production of sperm cells.
- These cells are located on the outermost layer of the seminiferous tubules.
- They undergo a process called spermatogenesis, which involves multiple stages of cell division and differentiation to produce mature sperm cells.
- Germinal epithelial cells are diploid, meaning they contain a full set of chromosomes (46 in humans).
- Through the process of mitosis, these cells can divide to give rise to more germinal epithelial cells, ensuring the continuous production of sperm.

Cells of Sertoli:
- Cells of Sertoli, also known as Sertoli cells or sustentacular cells, are the supporting cells within the seminiferous tubules.
- They play a crucial role in the development and maturation of sperm cells.
- Sertoli cells provide physical support to the developing sperm cells and maintain the blood-testis barrier, which separates the developing sperm cells from the circulating blood.
- They also provide essential nutrients, hormones, and growth factors to the developing sperm cells.
- Sertoli cells are involved in the process of spermatogenesis, including the formation of spermatozoa and their release into the lumen of the seminiferous tubules.
- Additionally, these cells are responsible for phagocytosis of excess cytoplasm and faulty sperm cells, contributing to the quality control of sperm production.

Overall, the presence of germinal epithelial cells and cells of Sertoli in the seminiferous tubule area ensures the continuous production of sperm cells and the proper development and maturation of these cells. Their coordinated functions are essential for male fertility.