$A$ milkman is very upset one morning as his cow refuses to give any milk. The milkman's wife gets the calf from the shed. On feeding by the calf,the cow gave sufficient milk. Describe the role of the endocrine gland and the pathway associated with this response.

(N/A) Suckling by the calf triggers a neurohormonal reflex action.
When the calf suckles,sensory impulses are sent to the hypothalamus.
The hypothalamus stimulates the neurohypophysis (posterior pituitary) to release the hormone oxytocin into the bloodstream.
Oxytocin travels through the blood to the mammary glands.
It causes the contraction of smooth muscles (myoepithelial cells) surrounding the alveoli of the mammary glands,resulting in milk ejection.
The entire process can be summarized as follows:
Mammary gland (stimulation by suckling) $\rightarrow$ Brain (Hypothalamus) $\rightarrow$ Neurohypophysis $\rightarrow$ Blood (Oxytocin) $\rightarrow$ Mammary gland (smooth muscle contraction) $\rightarrow$ Milk ejection.