Cynodonta contains the most mammal-like of the non-mammaliantherapsids, which are sometimes termed 'mammal-like reptiles'. The most derived cynodonts are found within a taxon called Eucynodontia, which also contains the members of Mammalia.
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The external urethral sphincter is the skeletal muscle that allows voluntary control over urination.
In the human female, the urethra is about 1-1.5 ...