Character Endocrine Gland Exocrine Gland i. Definition The glands whose secretions are always inside the body are called endocrine glands. The glands whose secretions come out of the body are called exocrine glands. ii. Secretions Hormones Enzymes and other than hormones iii. Passage of secretions Travel through blood Never released into blood iv. Ducts Absent, hence also called duct less glands Present, hence also called duct glands. v. Examples Glucagon, insulin, etc. Enzymes like trypsin, erepsin, etc.