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.
Reproductive System. The male reproductive system consists of testes, ducts, glands, urethra and penis. The testes (from splanchnic hypomere mesoderm) are located in an external pouch, the scrotum, which is a projection from the peritoneal cavity.Scrotal sacs have descended outside the abdominal cavity to keep the sperm cool.xcretory System. The structures of the excretory system are paired kidneys and ureters from mesomere mesoderm, and an unpaired urinary bladder and urethra. Locate the kidneys on the dorsal part of the abdomen on either side of the vertebral column, embedded in fat. Note a small adrenal gland anterior to each kidney.