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