anus

phasmid placed about 1/3 length of the tail behind the anus;

postanal myomeres Myomeres posterior to the posterior margin of the anus; includes terminal myomere from which urostyle will form.

Medical examination of the prostate, usually with his right index finger, put on rubber fingerstall, into the anus to check for palpation.

There exist most of mucous cells are in epithelia of intestine,rectum and flank valvae of anus,which is type Ⅱ.

These are some images and video showing a severe fetal anomaly. The final diagnosis was OEIS complex (Omphalocele-Exstrophy-Imperforate anus-Spinal defect).

In larval stage: dentition formula 2|2, had no spiracular plate, there were a pairs of anal setas and had no anus sulcus posterior.