Question

multiple select question
select all that apply
which of the following are characteristics of endocrine glands?
□ they secrete hormones into tissue fluid.
□ they are connected to body surfaces.
□ they contain ducts.
□ they are ductless.

Explanation:

Endocrine glands secrete hormones directly into the tissue fluid and are ductless. Exocrine glands are connected to body - surfaces and have ducts.

Answer:

They secrete hormones into tissue fluid.
They are ductless.