Answer the following question given this paragraph: 

Glandular Epithelium A gland is a structure made up of one or more cells modified to synthesize and secrete chemical substances. Most glands consist of groups of epithelial cells. A gland can be classified as an endocrine gland, a ductless gland that releases secretions directly into surrounding tissues and fluids (endo- = “inside”), or an exocrine gland whose secretions leave through a duct that opens directly, or indirectly, to the external environment (exo- = “outside”).


Q: Which ductless gland releases secretions directly into surrounding tissues and fluids?

 Choices:

- marrow gland

- pineal gland

- adrenal glands

- endocrine gland

A:
endocrine gland
