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THE ORGANIZATION OF PROTOPLASM
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abnormal action activity adrenal afferent nerves alveoli amino acids animal aorta apparently arterial blood pressure bacteria blood cells blood flow blood pressure blood stream blood vessels body brain breathing movements capillaries carbon dioxide cardiac carotid carotid sinus cause cavity changes chemical chest circulation clotting concentration contraction cortex diffusion digestive disease effect efferent energy enzymes epinephrine excreted experimental factors fluid function gastric gland glucose heart rate heat hemoglobin hormone hypophysis hypothyroidism increased inhibition injection insulin intestine juice kidney liver lungs lymph mammals mechanisms medulla membrane metabolism molecules muscular nerve fibers nerve impulses nervous system normal occur organs oxygen pancreas physiological plasma produced protein protoplasm quantity reaction red cells reflex region respiration respiratory center salivary salt secretin secretion sensory sinus skeletal muscle spinal cord stimulation stomach structure substance sugar systole thyroid tion tissue tube tubules urine vagus nerve vasoconstrictor veins venous ventricles volume walls