MAMMARY GLANDS
FOR DIFFERENT
SPECIES
Emily Schwakee
Iowa 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 GLANDS
thoracic
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