2012-02-01 Lactation

2012-02-01 Lactation - Lactation Dr. N. Matthew Ellinwood,...

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Lactation IOWA STATE UNIVERSITY Dr. N. Matthew Ellinwood, D.V.M., Ph.D. February 1, 2012
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Final Exam Format Essay/short answer component 3 at 15 points each Answer one of the two following questions . . . 45 multiple choice/T or F question To encompass material through: Thursday Feb 2, 2012
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Lactation Defining characteristic of mammals Warm blooded vertebrates Haired skin Bearing of live young (usually) Nursing young http://farm1.static.flickr.com/172/432172524_2941869cde.jpg?v=0
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Anatomy Multiple paired teats Dog – 10 Cat – 8 Variation (can have 8-12) Blood and lymphatic supply Can affect spread of disease Mastitis and cancer Mastitis- rare, but serious cases occur Cancer- common and preventable www.acvs.org
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Anatomy continued Parenchyma of the mammary gland Secretory, ductal, and connective tissue Teat sinus Smaller than in cattle Teat canal Less than half the length of the teat Teat openings Multiple openings per teat Dog ~ 10 Cat ~ 5 http://en.wikibooks .org/wiki/Anatomy _and_Physiology_o f_Animals/Reprodu ctive_System
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Mammary Gland Development No significant mammary tissue during anestrus Second half of pregnancy (and late pseudopregnancy) sees the development mammary glands to support nursing young Endocrine dynamics peak at parturition to support lactogenesis Declining progesterone Increasing estrogen, prolactin, growth hormone, and glucocorticoids
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2012-02-01 Lactation - Lactation Dr. N. Matthew Ellinwood,...

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