Asplinter penetrates to the deepest layer of the epidermis on your foot. this layer is called the

stratum basale

 The stratum basale (basal layer, sometimes referred to asstratum germinativum) is the deepest layer of the five layers of the epidermis, the outer covering of skin in mammals. Thestratum basale is a single layer of columnar or cuboidal cells.

but there is no

i guess you forgot putting it.

nucleus

would be most reasonable answer tbh