Ranging from the size of pea to the size of a hazelnut, the anal sacs are embedded between the internal and external anal sphincter muscles on each side of the anus. (dogcare.dailypuppy.com)
A new study from University of Tampere, Finland suggests that human adipose stem cells injection represent a simple and feasible treatment option for anal sphincter muscle injury (stemcellsportal.com)
Dogs and cats have a pair of anal sacs, one located on each side of the anus between the external and internal anal sphincter muscles. (brittonroadveterinaryclinic.com)