When Patton Oswalt lets loose on Twitter (letâs skip the loaded troll descriptor for now), he really digs in and this time he exposed previously unknown depths of reaching when he somehow elicited Breitbart editor Ben Shapiro to inexplicably whine about anti-semitism and generally lose his mind.
Digestive System. Echinoderms have a simple digestive system with a mouth, stomachs, intestineand anus. In many, the mouth is on the underside and the anus on the top surface of the animal. Sea stars can push their stomachs outside of their body and insert it into its prey allowint them to digest the food externally.
List of systems of the human body. The main systems of the human body are: Cardiovascular / Circulatory system: Circulates blood around the body via the heart, arteries and veins, delivering oxygen and nutrients to organs and cells and carrying their waste products away. Digestive system / Excretory system: Mechanical and chemical processes that provide nutrients via the mouth, esophagus, stomach and intestines.