Flatworms possess excretory organs known as nephridia. Specifically as annelids, flatworms possess a variant known as metanephridia.
<span>The determining factor in how well a patient is able to compensate for loss of blood in usually related to how rapidly they are bleeding. The ability or the lack of ability to compensate for blood loss is controlled by a patient's cardiovascular system, but the rate of blood loss is key.</span>
Cytoplasm maintains the internal pressure in the cell.