Changes

==Groove Closure==

==Groove Closure==

An unconditioned reflex when the animal is eager for milk. Water consumption does not usually iniatiate groove closure. The age when the [[Rumen - Anatomy & Physiology|rumen]] becomes fully functional and the oseophageal groove closes differs between ruminants; In calves 20 weeks, in lambs 8 weeks, in deer 16 weeks and in goats 12 weeks. It closes by reflex stimulation of the cranial laryngeal branch of the '''vagus nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN X]]) (takes 2-5 seconds). With time it becomes a conditioned reflex. The closure consists of two movements, the lips of the groove become firmly opposed and shorten and the lips become inverted and twisted around the axis of the right lip of the groove, drawing the reticular mucosa over the right [[Lips|lip]].

It is an unconditioned reflex when the animal is eager for milk. Water consumption does not usually initiate groove closure. The age when the [[Rumen - Anatomy & Physiology|rumen]] becomes fully functional and the oseophageal groove closes differs between ruminants; In calves 20 weeks, in lambs 8 weeks, in deer 16 weeks and in goats 12 weeks. It closes by reflex stimulation of the cranial laryngeal branch of the '''vagus nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN X]]) (takes 2-5 seconds). With time it becomes a conditioned reflex. The closure consists of two movements, the lips of the groove become firmly opposed and shorten and the lips become inverted and twisted around the axis of the right lip of the groove, drawing the reticular mucosa over the right lip.

==Function in the Adult Ruminant==

==Function in the Adult Ruminant==

==Histology==

==Histology==

*Floor of groove smooth and pale

The floor of the groove is smooth and pale lined with stratified squamous epithelium.

 

*Stratified squamous epithelium

==Links==

==Links==

[[Category:Stomach - Anatomy & Physiology]]

[[Category:Stomach - Anatomy & Physiology]]

[[Category:To Do - AimeeHicks]][[Category:To Do - AP Review]]

[[Category:A&P Done]]