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Needs/Functions of Internal Systems Plant Animal Bring energy into the body Photosynthesis in leaves, phloem in vascular system carries sugar-rich sap from leaves to where it’s needed Digestive system (mouth, esophagus, liver, pancreas, stomach, small and large intestines, rectum, anus Bring water into the body Roots, xylem in vascular system Digestive system Get needed gases from the air Gas exchange at plant surface (stomates) Respiratory system (nostrils, nasal passages, mouth, trachea, lungs, bronchi, diaphragm) Store and release energy when needed Cellular respiration of sugar Cellular respiration of sugar Circulate nutrients/gases/water and move wastes Plant vascular system (phloem, xylem) Most familiar plants (trees, grasses, shrubs) have vascular systems. Circulatory system (blood, heart, arteries, veins) Dispose of waste products Gas/liquid exchange at plant surface (stomates) Excretory system (cleans cellular wastes from blood - kidneys, bladder, urethra, sweat through skin); and the bottom part of the Digestive system (removes unused food: large intestine, rectum, anus)