Animal Physiology

acetylcholine active adenohypophysis adrenal adrenalin amino acids amount arterial autonomic nervous system bats biology birds blood pressure blood vessels body temperature brain called capillary carbon dioxide causes cent central nervous system chemical contains contraction crab decreases diffuse digestion dissolved drink sea water effect electric endocrine enzymes example excrete fish fluid FOOD AND ENERGY formed function gills gland glucose grams heart heat hemoglobin hibernators higher hormone hypophysis increase insects intestine invertebrates ions juvenile hormone kidney located lower lungs mammals marine metabolic rate molecules molt movements muscle fiber nephron nerve cells nerve fiber nerve impulse neurohypophysis nitrogen normal organs osmotic concentration oxidation oxygen pancreas physiological plasma processes produced protein regulation released respiration respiratory salt secretin secretion sensitive sensory similar sodium solution spinal cord stimulated stomach structure substances sugar surface sweat swimbladder thyroid tion tissues tolerance transport tubule urea urine vertebrates vitamin volume wall