Different type of glands

what is secretion

s the process whereby gland cells obtain needed substances from the blood and transform them chemically into a product that is then discharged from the cell

Endocrine gland

Endocrine glands

• Ductless glands that secrete directly into

surrounding tissue fluid

• Produce messenger molecules called hormones

what is an exocrine gland

Exocrine glands

• Ducts carry products of exocrine glands to

epithelial surface

• Include the following diverse glands:

• Mucus-secreting glands

• Sweat and oil glands

• Salivary glands

• Liver and pancreas

The only major one-celled exocrine gland in humans is the goblet cell

goblet cells are scattered within the epithelial lining of the intestines and respiratory tubes, between columnar cells with other functions.

Unicellular Exocrine Glands (The Goblet Cell

Goblet cells produce mucin

• Mucin + water =mucus

• Protects and lubricates many internal body

surfaces

• Goblet cells are a unicellular exocrine gland

Multicellular Exocrine Glands

Have two basic parts

• Epithelium-walled duct

• Secretory unit

clacification Multicellular Exocrine Glands

Classified by structure of duct

• Simple

• Compound

• Categorized by secretory unit

• Tubular

• Alveolar

• Tubuloalveolar