See also Table 19-1 for comparison. The Milk Ejection Relfex See Figure 19.1 Manual stimulation elicits a neural response from sensory nerves originating in the skin. These nerves synapse with cells in the hypothalamus. Oxytocin is released from these axons, and travels via circulation to mammary gland. Myoepithelial cells surrounding alveoli contract when stimulated, ejecting milk into ducts.
Ducts drain to bottom of quarter into the gland cistern.
19.2 Pulsator alternates pressure in chamber between teat cup and liner. Expansion phase - vacuum in chamber. Massage phase - atmospheric pressure in chamber. No milk flow. Milking System Components See Figure 19.7 for milking parlor components.