| http://www.w3.org/ns/prov#value | - - muscularis externa - longitudinal muscle forms 3 ribbon like stripes > pouches called haustra ??? ??? ??? Name and briefly describe 2 types of contractions that occur in the colon and nowhere else in the alimentary canal. 1) HAUSTRAL CONTRACTIONS - (every 30min) - most common > curns & mixes the residue, promotes water and salt absorption and passes the residue distally to another haustrum 2) MA
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