MAMMARY GLANDS FOR DIFFERENT SPECIES
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Transcript of MAMMARY GLANDS FOR DIFFERENT SPECIES
MAMMARY GLANDSFOR DIFFERENT
SPECIES
Leo TimmsIowa State University
MAMMARY GLANDS• Similar development• Similar hormones• Species differences• Similar anatomy
- epithelium ( duct/secretory)- myoepithelial tissue
- stromal tissue• WHAT ABOUT TEATS? #? PLACE?
MAMMARY GLANDS• Monotremes: no teats, lots of tubes!
MAMMARY GLANDS
• Other classes: Teats - Different locations
- Different numbers - Different # nipple openings / teat
MAMMARY GLANDSthoracic inguinal abdominal
MAMMARY GLANDS
• 4 abdominal; 15 openings / teat
MAMMARY GLANDS
• Developmentally independent glands
MAMMARY GLANDS
• 13 abdominal; 8 openings / teat
MAMMARY GLANDS
• 2 thoracic, 6 abdominal, ; 3-7 openings / teat
MAMMARY GLANDS
• 2 thor., 6 abdom. 2 ing., ; 8-10 openings/ teat
MAMMARY GLANDS
• 4 thor., 2 abdom. 4 ing., ; 1 opening/ teat
MAMMARY GLANDS
• 2 inguinal ; 1 opening/ teat
MAMMARY GLANDS
• 2 inguinal ; 2 openings/ teat
MAMMARY GLANDS
• 4 inguinal ; 1 opening/ teat
MAMMARY GLANDS
• 2 inguinal ; 1 opening/ teat
MAMMARY GLANDS
• 4 thor., 6 abdom. 2 ing., ; 2 openings/ teat
MAMMARY GLANDS
• 2 thoracic ; 15-25 openings/ teat