Anal sinuses
An anal sinus is a furrow formed between any two adjacent anal columns of the anal canal. An anal sinus is limited inferiorly by an anal valve. The anal glands open into the anal sinuses.''''''
An anal sinus is a furrow formed between any two adjacent anal columns of the anal canal. An anal sinus is limited inferiorly by an anal valve. The anal glands open into the anal sinuses.''''''