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Mr. Bailey Agri-Science

The Dairy Industry. Mr. Bailey Agri-Science . Where does the milk come from?. Process of producing milk is called lactation Occurs after birth of a calf Milk production occurs in the udder. Mammary Gland (Udder). How do I get the milk out?. Cows are milked by machines

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Mr. Bailey Agri-Science

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  1. The Dairy Industry Mr. Bailey Agri-Science

  2. Where does the milk come from? • Process of producing milk is called lactation • Occurs after birth of a calf • Milk production occurs in the udder

  3. Mammary Gland (Udder)

  4. How do I get the milk out? • Cows are milked by machines • Udder is cleaned before and after milking • Helps to avoid contamination

  5. Milk- “I’m going on a trip” • Goes to processing plant • Checked for bacteria and infection • Sits for cream to raise and be removed • Cream contains fat

  6. Milk- “What happens when I get the plant.” • Homogenization- large cream globules are reduced to the size of the milk globules • Homogenized milk – cream will not separate from the milk

  7. Milk- “What’s next.” • Pasteurization- milk is heated and cooled to kill any harmful organisms • Grading • A – beverage milk • B – manufacturing dairy products (cheese, butter, yogurt)

  8. The Difference in Milk • Whole milk- contains fat • 2% - contains some fat • 1% - contains little fat • Skim- contains no fat A gallon of milk weights between 8.5 - 8.8 lbs. depending on fat content.

  9. Milk Processing Video • http://www.bing.com/videos/search?q=how+is+milk+processed&view=detail&mid=0B63C31979253215D8610B63C31979253215D861&first=41

  10. Common Breeds of Dairy Cattle • Holstein – 90% of U.S. dairy cattle • Jersey – high in butterfat and protein • Guernsey • Brown Swiss

  11. Holstein

  12. Jersey

  13. Exit Slip • Identify the process milk takes from the farm to what you buy in the store based on the information learned today.

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