Types of glands.. The glands, which flow through the channels and endocrine glands that flow directly into the blood

There are two types of glands:
- The glands of the ducts are the glands that pour their secretions through channels. Such as the liver, salivary glands.
Endocrine glands are the secretions that flow directly into the bloodstream (no channels). Such as pituitary glands and thyroid glands.