858 



INDEX 



Evolution, straight-line, 707 



F.volutionary relationships of the higher 



in\ertcbrates, 283 

 Excitation, 587 

 Excretion, 515. 559 

 Excretory system, birds, 477 



dogfish, 435 



lamprey. 431 



mammals. 489 



reptiles, 454 

 Excurrent siphon, 252, 386 

 Exophthalmic goiter, 614 

 Exopodite, 294 

 Exopterygota, 315, 837 

 Exoskeleton, 96, 327 

 Expiration, 534 

 Expressivity, 680 

 Extension, 401 

 Extensor, 512 



External auditory meatus, 454, 510, 583 

 External carotid, 408 

 External gills, 420 

 External gill slits, 430 

 External nares, 395, 510, 531 

 Exteroceptors, 1 07 

 Extracellular fluid, 537 

 Extraembryonic coelom, 131, 643 

 Extraembryonic membranes, 455, 571 

 Exumbrellar surface, 187 

 Eye, 250, 478 



camera, 110 



chambers of, 578 



mosaic, 110 



vertebrate, 576, 580 

 Eyebrush, 318 

 Eyelids, 395, 448, 579 

 Eyespots, 225 



Facial muscles. 514 



Facial nerve, 417 



Facilitation, 106 



Falco, 841 



Falconiiformes, 841 



Fallopian tube, 570, 571 



Family, 141, 143 



Fangs, 461 



Farsightedness, 580 



Fasciculata, 618 



Fatigue, 103 



Fats, 26 



Fatty acids, 26, 523 



Feather stars, 371 



Feathers, 471, 505 



Feces, 515 



Feed-back mechanism, 612 



Felis, 842 



Femur, 308, 401, 512 



Fenestra ovalis, 415 



Fermentation, 71 

 Fertilization, 123, 124, 571 

 external, 123 

 internal, 124 

 Fertilization membrane, 124 

 Fertilizin, 124 

 Fetal zone of adrenal, 618 

 Fetus, 646 

 Fibrin, 541 

 Fibrinogen, 538, 541 

 Fibrous connective tissue, 55 

 Fibula, 512 

 Fig insect, 787 

 Filarial roundworms, 811 

 Filarioidea, 834 

 Filibranchiata, 834 

 Filoplumes, 471 

 Filtration pressure, 563 

 Finches, 482 

 Fischer, Emil, 69 

 Fishes, 424-444 



characteristics of, 433 

 evolution of, 436, 440 

 respiratory system, 529 

 Fission, 115 

 Fissipedia, 842 

 Fissure of Sylvius, 602 

 Flagella, 15, 99, 149 

 Flagellata, 148, 152, 832 

 Flame cells, 93, 208, 223 

 Fleas, 803 



Fleshy-finned fishes, 442 

 Flexion, 401 

 Flexor, 512 

 Flight, 97 



principles of, 468 

 Flight muscles, 334 

 Flounders, 442 



Flukes, 213, 807 



Flying lemur, 493 



Flying reptiles, 464 



Flying squirrel, 493 



Folic acid, 527 



Follicle, 566, 608 



Follicle-stimulating hormone, 626 



Food, 515 



Food chains, 767 



Food vacuole, 79, 158, 186 



Foramen magnum, 397, 509, 510 



Foramen of Monro, 598 



Foramen ovale, 550 



Foraminifera, 159, 832 



Foregut, 643 



Forestry, 824 



Form, regulation of, 201 



Fossil, 424, 716 



Fovea, 578 



Fowl, 481 



Fraternal twins, 646, 692 



Fresh-water habitats, 797 



