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Glandular epithelium

 

Exocrine glands

Unicellular glands

Slide 41: Ileum The following two figures illustrate the structure of a unicellular gland.

Simple multicellular glands

Slide 42: Colon This slide is used to illustrate the structure of a simple straight tubular gland.

Clinical case
A 26-year old very obese male patient consults his family doctor complaining about excessive sweating which he finds embarrassing.

His doctor explains to him that he has the condition called hyperhidrosis, which is caused by his overweight and is the excessive production of sweat. His sweating is an attempt by his body to lose heat.

  • What are the different structures of an merocrine sweat gland?
  • How do these structures differ histologically and functionally?
  • Where do merocrine sweat glands open in the body?
  • What other types of sweat glands are found in the body and where are these glands located?
Slide 93: Skin This slide is used to illustrate the structure of a simple coiled tubular gland.

Clinical Case
An 18-year old woman visits a dermatologist because of the presence of infected spots on her chin, chest, and back. She says she has experienced spots and blackheads in the same regions since she was 13 years old. She has been told by her family doctor that she is suffering from acne vulgaris and will grow out of it. She is now very concerned by the fact that as each lesion resolves, she is left with a scar. Her dermatologist tells her that increased secretion of sebum and blockage of the duct of the sebaceous gland cause her acne. The inflammatory reaction can be treated satisfactorily by systemic antibiotic administration and topical steroids.
  • Name all the locations where sebaceous glands are found in the body.
  • Where do the ducts of sebaceous glands generally open?
  • In which way do the cells secrete the sebum?
Slide 95: Scalp This slide is used to illustrate the structure of a simple alveolar gland.

Compound multicellular glands

Slide 50: Pancreas This slide is used to illustrate the structure of a compound tubulo-alveolar gland.
 

Secretion of different types of secrete

Analogy
Slide 35: Submandibular salivary gland Illustrating the structure and arrangement of the cells of a serous secretory unit.
Slide 39: Pharyngeal tube (Eustachian tube) Illustrating the different structures of mucinous and mixed glands.
Slide 7: Tongue tip Structure of mucinous and mixed glands.

Endocrine glands

Slide 52: Pituitary gland Arrangement of the glandular cells in groups around the sinusoids.
Slide 55: Thyroid gland Arrangement of the glandular cells into follicles.
Slide 56: Adrenal gland Arrangement of the glandular cells into groups and cords around the bloodvessels.
Slide 50: Pancreas Arrangement of the glandular cells into islands.

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© augustus 2002 - augustus 2007 marius loots