Glands

A gland consists of one or more cells that make and secret a particular product.

ENDOCRINE GLANDS

EXOCRINE GLANDS

Because endocrine glands eventually lose their ducts, they are often called ductless glands. The also produce hormones. These glands are structural diverse; they don't just have one description. Most endocrine glands are compact multicellular organs, but some individual hormone-producing cells are scattered in the digestive tract mucosa and in the brain, giving their collective description as the diffuse endocrine system.

Exocrine glands are much more numerous than endocrine glands all exocrine glands secrete their products onto body surfaces or into body cavities. Their are various exocrine glands that include- mucous, sweat, oil, salivary glands, the liver, the pancreas, and many more.

UNICELLULAR VS. MULTICELLULAR GLANDS

Compared to unicellular exocrine glands, the multicellular glands are more structurally complex. They are either simples or compound glands. Multicellular exocrine glands have two basic parts- an epithelium derived duct and secretory unit that consists of secretory cells. They also have multiple different ways of secreting their products.