describe the system for nutrient uptake in each as well as name the phylum associated with each type, and relate the changes to the efficiency of the organism to uptake nutrients from it's environment (Annelids, Mollusks, and Arthropods) Match to the following Simple Choanocytes: Blind Gut (Gastrovascular Cavity): Complete Digestive System:

Intrinsic factor: increases gastric motility. causes the release of stomach acid. facilitates the absorption of vitamin B12. protects the stomach lining from the effects of stomach acid. Mucus stimulates the synthesis of DNA.

Which of the following statements is true about the digestive system of simple invertebrates like sponges and sea anemone? *       No answer One opening only used as anus One opening only used as a mouth One opening for mouth and another opening for the anus One opening which is used as a mouth and anus

Propulsion moves foods from one region of the digestive system to another and use the: Segmentation – alternating waves of contraction Peristalsis – moving materials back and forth to aid in mixing True or False?