210 



INDEX 



Physiological properties of pro- 

 toplasm (see Living matter) 



Physiology, 1, 2, 7, 124 



Pisces, 188 



Plants, 1, 2, 9, 19, 52, 53, 95, 

 125, 189-191 



Plasma, 80 



Poisonous substances, 58, 79, 

 140 



Poison jaws, 181 



Pores of skin, 61 



Potato, 12, 16, 19 



Potato section, 12 



Pressure, 24, 25, 26, 27, 28, 29, 

 30, 31, 32, 34, 38, 39, 43, 78, 

 85, 142, 151, 186 



Primary layers, 93, 135, 136 



Proteids, 53, 56, 57, 61, 75, 76, 

 80 



Protoplasm, 8, 9, 10, 11, 12, 21, 

 53, 87, 124 



Protozoa, 128 



Pulmonary artery, 72, 73 



Pulmonary vein, 72, 73 



Pulse, 74 



Radial canal, 151 



Radial nerve, 150 



Radial symmetry, 148, 149, 152 



Rate of heart beat, 85 ; of res- 

 piration, 85; of passage of 

 gas, 25, 26 



Red blood corpuscles, 76, 77, 78 



Reflex action, 114 



Regeneration, 152, 153 



Relaxation, 42 



Reproduction, 87-98; of proto- 

 zoa, 11, 132; of coelenterata, 

 143-145; of ecliinodermata, 

 152; of mollusca, 161; of 

 earthworms, 169, 170; of 

 vermes, 171, 172; of arthrop- 

 oda, 175, 176, 180, 183; of 

 vertebrata, 188 



Reproductive cells, 89, 90, 144, 

 190 



Reproductive organs, 90, 180, 

 186 



Reptilia, 188 



Respiration, 23-44; of protozoa, 

 132; of coelenterata, 141; of 



echinodermata, 151; of mol- 

 lusca, 156, 157, 160; of 

 vermes, 164; of arthropoda, 

 174, 175, 180, 183; of ver- 

 tebrata, 186 



Retractor muscles, 152 



Rhythmical contraction of 

 heart, 69, 70, 85; in in- 

 sects, 183; of jellyfish, 141; 

 of muscles, 101, 102 



Ribs, 36, 37, 105, 106, 107 



Roots, 13, 16 



Round worms, 171 



Rust, 18 



Saliva, 56 



Salt, 52 



Salts, 52 



Sap, 19, 20 



Scales, 187 



Scallops, 159 



Science, 123 



Scorpions, 181 



Sea anemone, 102, 137, 139, 



140, 141, 143 

 Sea urchin, 90 

 Segment, 168, 173, 181 

 Segmentation, of animals, 171, 



173, 180, 181, 187; of egg 



(see Cell division) 

 Segmented animals, 169 

 Segmented worms, 172 

 Seminal receptacles, 169 

 Seminal vesicles, 166, 167 

 Sensations, 83, 84, 113 

 Sense organs, 115, 143, 150, 



159, 175, 176, 178, 182, 187 

 Senses, special, 115 

 Sensory (afferent) nerves, 113 

 Sepia, 159 

 Septa, 168 

 Serum, 80 

 Setse, 163 

 Sexual cells, 91 

 Sexual reproduction, 88-94 

 Shells, 154, 155, 156 

 Shivering, 117 

 Shoulder blade/ 105 

 Shoulder girdle, 105 

 Shrimp, 176 

 Sight, sense of, 17§ 



