Glandular Epithelium Glandular Epithelium n Glandular epithelium is

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Glandular Epithelium

Glandular Epithelium

Glandular Epithelium n Glandular epithelium is more complex and varied than the epithelial cells

Glandular Epithelium n Glandular epithelium is more complex and varied than the epithelial cells which cover surfaces or line tubules or vessels.

Glandular Epithelium n n Glandular epithelium is more complex and varied than the epithelial

Glandular Epithelium n n Glandular epithelium is more complex and varied than the epithelial cells which cover surfaces or line tubules or vessels. Glandular epithelium form glands which can consist of one or more cells that make and secrete a product.

Products n Water soluble protein

Products n Water soluble protein

Products n n Water soluble proteins Nonpolar lipids or steroids

Products n n Water soluble proteins Nonpolar lipids or steroids

Classification n Glands are classified first based on the presences or absence of a

Classification n Glands are classified first based on the presences or absence of a duct for the secretory products.

Endocrine Glands n n Are ductless glands Secrete their products directly into the capillaries.

Endocrine Glands n n Are ductless glands Secrete their products directly into the capillaries.

Exocrine Glands n secrete their products onto a body surface or a cavity.

Exocrine Glands n secrete their products onto a body surface or a cavity.

Exocrine Glands n n secrete their products onto a body surface or a cavity.

Exocrine Glands n n secrete their products onto a body surface or a cavity. are classified first based on cell number

Unicellular Exocrine Glands n are made of up of single cells which secrete their

Unicellular Exocrine Glands n are made of up of single cells which secrete their products directly through exocytosis onto a surface.

Unicellular Exocrine Glands n n are made of up of single cells which secrete

Unicellular Exocrine Glands n n are made of up of single cells which secrete their products directly through exocytosis onto a surface. The only major examples are the goblet cells and mucous cells

Unicellular Exocrine Glands n n found mixed with the columnar epithelium in the digestive

Unicellular Exocrine Glands n n found mixed with the columnar epithelium in the digestive and respiratory tracts. They secrete products called mucins (mucous), glycoproteins that lubricate.

Multicellular Exocrine Glands n are made up many cells and are composed of two

Multicellular Exocrine Glands n are made up many cells and are composed of two parts.

Multicellular Exocrine Glands n are made up many cells and are composed of two

Multicellular Exocrine Glands n are made up many cells and are composed of two parts: A epithelial lined duct n A secretory unit called the acinus n

Multicellular Exocrine Glands n Supportive connective tissue surrounds the secretory unit and provides blood

Multicellular Exocrine Glands n Supportive connective tissue surrounds the secretory unit and provides blood vessels and nerve fibers.

Multicellular Exocrine Glands n n Supportive connective tissue surrounds the secretory unit and provides

Multicellular Exocrine Glands n n Supportive connective tissue surrounds the secretory unit and provides blood vessels and nerve fibers. The shape of the duct and of the secretory unit provides for another level of classification.

Duct Structure n Simple- unbranched, straight duct

Duct Structure n Simple- unbranched, straight duct

Duct Structure n n Simple- unbranched, straight duct Compound- branched duct

Duct Structure n n Simple- unbranched, straight duct Compound- branched duct

Secretory Unit: n Tubular- if the secretory unit has the same diameter throughout like

Secretory Unit: n Tubular- if the secretory unit has the same diameter throughout like a tube

Secretory Unit n n n Tubular- if the secretory unit has the same diameter

Secretory Unit n n n Tubular- if the secretory unit has the same diameter throughout like a tube Alveolar- if the secretory unit is in the shape of a flask both of these terms refer to the acinus or secretory unit.

Examples

Examples

Method of Secretion n Glands regardless of type (unicellular or multicellular) can have one

Method of Secretion n Glands regardless of type (unicellular or multicellular) can have one of two types of secretory processes:

Method of Secretion n n Glands regardless of type (unicellular or multicellular) can have

Method of Secretion n n Glands regardless of type (unicellular or multicellular) can have one of three types of secretory processes: Merocrine- products are secreted by exocytosis. This is seen with most glands.

Method of Secretion n Glands regardless of type (unicellular or multicellular) can have one

Method of Secretion n Glands regardless of type (unicellular or multicellular) can have one of three types of secretory processes: Merocrine- products are secreted by exocytosis. This is seen with most glands Holocrine- the cell ruptures and releases the product. New cells replace the spent cells. The only example in humans are the sebaceous (sweat) glands

Method of Secretion n Apocrine-the top of the cell pinches off. Possibly seen in

Method of Secretion n Apocrine-the top of the cell pinches off. Possibly seen in the lactating mammary gland although this is generally considered merocrine in nature.