642 



ANIMAL BIOLOGY 



Reese, 270 



Reflex act, 165, 244, 472 



Reflex action, 165, 243-245 472 



Reflex arc, 244, 333, 496 



Reflex centers, 496 



Regeneration, 143, 165, 187, 201, 206, 208, 230 



242, 264, 286, 381, 391 

 Regions, 532, 533, 535 

 Remora, 523 

 Remora remora, 523 

 Renal artery, 345 



Renal-portal system, 345, 346, 370, 388, 408 

 Renal vein, 345 

 Rennin, 328 



Reproduction, 18, 45-46, 105, 470-471, 475-479, 

 481, 521 

 ameba, 67-68 

 annelids, 251, 253 

 ascidians, 317-321 

 birds, 419-420 

 coelenterates, 151—153 

 crayfish, 263-264 

 Crustacea, 268, 269 

 earthworm, 240-241 

 echinoderms, 209-210 

 fish, 361-362 

 frogs, 373, 374, 377-380 

 hydra, 142-143 

 insects, 283-286 

 lizards, 391 

 mammals, 445-447 

 metazoa, 107-125 

 mollusca, 229-230 

 monotremes, 429 

 mussels, 217-219 

 myriapods, 275 

 nemathelniinths, 181 

 Paramecium, 74 

 planaria, 162-163 

 platyhelminths, 171 

 rotifers, 189-190 

 sharks, 347 



sheep liver fluke, 173-176 

 snails, 223 

 snakes, 395 

 spiders, 304 

 sponges, 134-135 

 starfishes, 201 

 tapeworm, 176-177 

 types of, 44-46, 107, 268 

 vertebrates, 339-340 



(See also Asexual reproduction; Sexual 

 reproduction) 

 Reproductive epithelium, 98 



Reproductive system, 104, 162-163, 240, 339- 

 340, 408, 470-471 

 (See also Reproduction) 

 Reptiles, 314, 382-385, 539, 543 



hearts, 386 

 Reptilia, 340, 385 

 Reservoir, 79 



Respiration, 11, 37, 42, 43, 104, 447, 467-468, 

 490-491, 515 

 ameba, 65 

 birds, 385, 407 



Respiration, earthworm, 236 



fishes, 358, 359 



hydra, 140 



insects, 280, 281, 293 



mussel, 215 



Paramecium, 71 



sea cucumber, 208 



sea urchins, 207 



snails, 224 



vertebrates, 329-330 

 Respiratory system, 104, 329, 467-468 



(See also Respiration) 

 Respiratory tree, 208, 209 



Responses, 54-56, 133, 141, 151, 162, 201, 210, 

 239, 263, 269, 495 

 (See also Reactions) 

 Resting cell, 48 

 Resurrection bone, 580 

 Reticular nervous system, 472 

 Reticular structure of protoplasm, 23 

 Reticulotermes flavipes, 288 

 Reticulum, 441 

 Retina, 223, 338, 339 



(See also Eye) 

 Retinal layer, 338, 339 

 Retinula, 261 

 Retinular cells, 260 

 Retrogression, 203, 319, 572, 575 

 Reversibility, 14 

 Rhabdites, 166, 167 

 Rhabdom, 260, 261 

 Rhabdophaga strobiloides, gall, 291 

 Rhagon canal system, 132 

 Rhea, 534 



Rheotropism, 56, 72 

 Rhinceros birds, 441 

 Rhinoceroses, 441, 534, 535 

 Rhizocrinus lofotensis, 210 

 Rhizopoda, 78, 494 



(See also Sarcodina) 

 Rhizostoma pulmo, 147 

 Rhodites rosae, gall, 291 

 Rhynchocephalia, 387, 398 

 Rhythmicity, 74, 482 

 Rhythms, 510 

 Ribs, 323-326, 425, 580 

 Ring canal, 197, 209 

 Rodentia, 429, 437 

 Rodents, 448 

 Rodolia cardinalis, 294 

 Rods, 252 

 Roe, 361 

 Rose coral, 154 

 Ross, Ronald, 91 

 Rostellum, 169, 170 

 Rostrum, 255, 256, 258 

 Rotalia freyeri, 81 

 Rotifera, 188, 574, 576 



Rotifers, 108, 187-188, 470, 471, 495, 508, 581 

 Roundmouths, 340 

 Roundworms, 178 



(See also Nemathelminths) 

 Routine, 520 

 Royal jelly, 298 

 Rudimentary organs, 544 



