Colostrum is the first milk produced by the mammary glands immediately after childbirth. It contains antibodies, primarily Immunoglobulin A (IgA), which are transferred to the newborn. This transfer of ready-made antibodies provides passive immunity to the infant,protecting them against infections during the initial days of life.
| List-I (Cell/Tissue/Organs) | List-II (System) |
|---|---|
| 1. Mesorchium | 1. Reproductive system |
| 2. Uriniferous tubules | 2. Excretory system |
| 3. Endocrine glands | 3. Chemical coordination |
| 4. Sinus venosus | 4. Vascular system |