Changes

==Histology==

==Histology==

[[Image:Omasum Histology Sheep.jpg|thumb|right|150px|Omasum Histology (Sheep) - Copyright RVC 2008]]

[[Image:Omasum Histology Sheep.jpg|thumb|right|250px|Omasum Histology (Sheep) - Copyright RVC 2008]]

*Keratinised stratified squamous epithelium

The omasum has a '''keratinised stratified squamous epithelium'''. The omasum is firm in texture and can vary in size. It consists of '''lamellae''' thrown into leaves that divide the lumen into narrow and uniform recesses. It contains no glands.

The '''papillae''' of the omasum are mostly small and lenticular, although some can be large and [[Tongue - Anatomy & Physiology#Types of Papillae|conical]]. The '''cicrular tunica muscularis''' extends into papillae of long laminae and the '''lamina muscualris''' extends into papillae encircling the '''tunica muscularis'''. The omasum has 3 smooth muscle layers in the papillae, and so they are very motile.

**Divides the lumen into narrow and uniform recesses

 

 

 

**Most small and lenticular

**Some large and [[Tongue - Anatomy & Physiology#Types of Papillae|conical]]

 

*Cicrular tunica muscularis extends into papillae of long laminae

 

*Lamina muscualris extends into papillae encircling tunica muscularis

 

*3 smooth muscle layers in papillae so they are very motile

==Species Differences==

==Species Differences==