| A | B |
| exocrine gland | a gland that secretes fluid into a duct |
| alveoli | a hollow cluster of cells; these cells secret milk |
| alveolus | plural form of alveoli |
| mastitis | inflammation of the mammary gland |
| lactose | milk sugar; when digested, it is broken down into one molecule of glucose and one molecule of galactose |
| colostrum | the first milk given by a female after delivery of her young; high in antibodies that protect young animals from invading microorganisms |
| milk fat | the fat in milk |
| casein | the major protein of milk |
| osteoporosis | an abnormal decrease in bone mass with an increased fragility of the bone |
| homogenized | milk that has had the fat droplets broken into very small particles so that milk fat stays in suspension in the milk fluids |
| acidified | food was produced by souring milk or cream with or without the addition of microbial organisms |