Organisms : Upkeep, Book 4Behavioral Research Laboratories, 1968 - Alimentary canal |
Common terms and phrases
active amino acids ammonia amount of water animals arteries autotrophic blood vessels body fluids called carbon dioxide carbonic acid carry cells closed compounds concentration consists constant contain Continued delivery chamber diffusion digestive direction eliminated energy enter excrete excretory by-products excretory organ external environment false filter filtration flow fresh-water fish function gaseous exchange gills grasshopper heart helps hemoglobin homeostasis human hydrogen important increase insect integument internal ions kidney tubule kinds less live lose loss lungs maintain Malpighian tubule marine fish materials means mechanism metabolic by-products Metazoa molecules move needed nitrogen nucleic acids occurs oxygen pass pigment plant pressure prevent proteins pumps reabsorbed reabsorption reaction receiving chamber removed require result salts secretion structure substances sugar tend terrestrial transport system true tubes urea uric acid urine valves veins walls yes yes/no