Structurally, what is the difference between the dermis and the epidermis?

Question

a. the epidermis is thicker
b. the dermis contains contains more types of tissue
c. the dermis is made mostly of dead cells
d. the epidermis consists of mostly adipose cells

Answer 1

B is correct. The epidermis is made of essentially one cell type--keratinocytes, which are attached to a basement membrane (contains extracellular matrix proteins). In contrast, the underlying dermis is composed of a variety of cell types/tissues, including fibroblasts, which secrete the extracellular matrix molecules in this connective tissue, blood vessels (which contain endothelial cells and smooth muscle cells, as well as more matrix), nerves, and immune cells (dendritic cells, etc.).

A is not correct, as the dermis is considerably thicker than the epidermis. C is not correct, as the cells of the dermis are not dead (this is more true of the epidermis, whose upper layers are composed of dead keratinocytes). D is not correct, as the epidermis is composed of keratinocytes, not adipose cells.

Answer 2

there are 2 parts of epidermis in a leaf 'upper epidermis and lower epidermis' It doesd't contain chloroplasts.Only dermis(middle part of a leaf)contain chloroplasts.there are many differences.

Answer 3

the dermis contains more types of tissue

Answer 4

Do your own homework.