Cells of the germinal matrix under go a process called keratinization, which is the formation of a layer of the protein keratin, keeping the hair from falling out.

• 毛囊具有基质细胞的免疫特权。滤泡细胞培植研究表明生发基质细胞能通过植入毛乳头细胞来诱导新毛囊形成。