CIVILIAN PERMANENT CHANGE OF STATION (PCS) CHECKLIST. A PCS move involves a great deal of advance planning and hard work. We would like to make this transition as. smooth as possible by providing this guide. Remember that this guide is just that-a guide, and does not supersede. any laws, regulations or directives that are already in place. 6 months out Report date -180 days.
Thus it is clear that cloaca is used for excretion as well as reproduction. This is also the opening that is used for laying eggs. Anus on the other hand is simply an opening at the distal end of the alimentary canal. It is a passage for undigested waste only.
In mammals, reptiles, some birds, some fish and certain other groups of animals, this is done by copulation, the penis or other intromittent organ being introduced into the vagina or cloaca. In most birds, the cloacal kiss is used, the two animals pressing their cloacas together while transferring sperm. Salamanders, spiders, some insects and some molluscs undertake internal fertilization by transferring a spermatophore, a bundle of sperm, from the male to the female.