Obligate intracellular bacteria cannot be grown in artificial media (agar plates/broths) in laboratories but requires viable eukaryotic host cells (eg. Nematodes are the most speciose phylum after the arthropods, they occur in nearly every habitat including as parasites in all sorts of plants and animals. 30. Still have questions? Formerly Peter S. Lv 7. In addition to the liver, what other adnexal gland of the digestive system releases substances involved in extracellular digestion into the duodenum? Differences between intracellular and extracellular digestion are (i) Intracellular digestion, occurs inside the living cells with the help of lysosomal enzymes. BIOLOGY question please answer. Digestion in Molluscs and Arthropods A. Digestion, Absorption and Assimilation in Molluscs 1. Intracellular digestion occurs within the cells, in the cytoplasm with the help of the enzymes present in the cytoplasm or in the lysosomes. Cell culture, embryonated eggs, susceptible animals). Answer Save. A cell membrane surrounds the cell, separating the cell interior and external environment. Ingestion occurs through pinocytic vesicle,e.g. Digestion in coelenterates is (1)Only intracellular (2)Only extracellular (3)Both extracellular and intracellular (4)Not required - 16244243 INTRACELLULAR DIGESTION occurs within the CELL usually in MEMBRANE-BOUND VESICLES. Relevance. Why? extracellular digestion - A form of digestion found in annelids, crustaceans, arthropods and chordates including vertebrates; takes place within the lumen of the digestive system, and the resulting nutrient molecules are transferred into the blood or body fluid The key difference between intracellular and extracellular fluids is that the fluid inside the cell is intracellular fluid, while the fluid outside the cell is extracellular fluid.. A cell is the basic structural and functional unit of life. Intracellular digestion takes place in animals without a digestive tract, in which food items are brought into the cell for digestion. extracellular digestion: Extracellular digestion is a process in which animals feed by secreting enzymes through the cell membrane onto the food. Intracellular digestion occurs primarily in liposomes, intracellular organelles that have the chemical ability to break down either intracellular waste or material that is outside the cell and ingested by the cell. Extracellular digestion occurs outside the cell; it occurs in the lumen of the gut, for example, with the help of the digestive enzymes that are poured over there. protozoans, sponges and coelenterates.Extracellular Digestion:1. The other adnexal gland of the digestive system is the pancreas. b. Lysosomal enzymes are secreted into the food vacuole.3. within a LUMEN or TRACT Intercellular Digestion:1. It is called intracellular (within the cell) digestion.