Glandular Epithelia • Exocrine Glands can be Classified by: – Structure of gland – Type of secretion produced – Mode of secretion • Endocrine Glands – Secretes hormones into directly into interstitial fluid, then blood stream (no ducts). Hormones only have an effect on tissues that have receptors for that hormone. • Exocrine Glands – Secretions made and discharged through ducts onto an exposed surface.
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Glandular Epithelia Exocrine Glands can be Classified by: –Structure of gland –Type of secretion produced –Mode of secretion Endocrine Glands –Secretes.
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Glandular Epithelia
• Exocrine Glands can be Classified by: – Structure of gland– Type of secretion produced– Mode of secretion
• Endocrine Glands– Secretes hormones into directly into interstitial fluid,
then blood stream (no ducts). Hormones only have an effect on tissues that have receptors for that hormone.
• Exocrine Glands– Secretions made and discharged through ducts onto an
exposed surface.
Structural Classification of Simple and Compound Exocrine Glands
Mucous – thick, sticky, viscous solution.
Serous – watery, slippery, thin solution.
Mixed – contains elements of both mucous and serous solutions.
Type of Secretion released from an Exocrine Gland
Example of Mucous Glands
The interior of the stomach is lined by a secretory sheet whose secretions protect the walls from acids and enzymes.
The submandibular salivary gland is a mixed gland containing cells that produce both serous and mucous secretions
Example of Serous & Mixed Glands
Membranes
= Epithelial Tissue
Connective Tissue
Membranes function to cover and protect body.
Mucous Membranes• Line passageways open to exterior.
• Moistened by mucous (mucin + H2O).
• 3 Layers:– Epithelium (simple or stratified)– Areolar CT called ‘Lamina Propria’ – Smooth Muscle called ‘Muscularis Mucosae’