Milk Biosynthesis. Evolution of lactose content with the stage of lactation

1. Milk Biosynthesis
Mr. Muhammad Imtiaz

2. BIOSYNTHESIS OF MILK
• The whole udder is laced with blood and lymph
vessels.
• These bring nutrient-rich blood from the heart to
the udder, where it is distributed by capillaries
surrounding the alveoli.
• In this way, the milk-producing cells are
furnished with the necessary nutrients for the
secretion of milk.
• “Spent”blood is carried away by the capillaries to
veins and returned to the heart.

3. BIOSYNTHESIS OF MILK

25. Evolution of lactose content with the stage of lactation
0
5
10
15
20
25
0 50 100 150 200 250 300
Lactation stage, d
Milk
yield,
kg/d
42
43
44
45
46
47
48
49
Lactose
content,
g/kg
Milk yield Lactose content
Inra (1978)

26. Evolution of fat content with the stage of lactation
0
5
10
15
20
25
0 50 100 150 200 250 300
Lactation stage, d
Milk
yield,
kg/d
34
36
38
40
42
44
46
Fat
content,
g/kg
Milk yield Fat content
Inra (1978)

27. Evolution of protein content with the stage of lactation
0
5
10
15
20
25
0 50 100 150 200 250 300
Lactation stage, d
Milk
yield,
kg/d
30
32
34
36
38
40
42
Protein
content,
g/kg
Milk yield Protein content
Inra (1978)