Contents 13 



CHAPTER PAGE 



Circulation in Man _______________ 477 



Functions of the Blood System ___________ 483 



Blood __________________ 484 



Clotting (Coagulation) of Human Blood ________ 486 



Structure and Functions of Human Lymph _______ 487 



Human Blood Groups _____________ 489 



Respiration in Man ____________--- 489 



Excretion of Wastes _______________ 492 



Coordination in Man and Sensory Equipment _______ 494 



Endocrine (Ductless Gland) System of Man ________ 506 



Human Reproduction and Development _ _ _ _ _ _ _ _ - 513 



Diseases of Man ______________-_516 



Inheritance of Human Traits ____________ 522 



Improvement of the Human Race — Eugenics ___ ____526 



26. Economic Importance of Animals __________ 530 



Phylum 1 — Protozoa (Single-Celled Animals) _______ 530 



Phylum 2 — Porifera (Sponges) ___________ -535 



Phylum 3 — Coelenterata (Hydra, Corals, Sea Anemone, Sea Cucumber) 536 



Phylum 4 — Ctenophora (Comb Jellies or Sea Walnuts) _____ 537 



Phylum 5 — Platyhelminthes (Flatworms) _________ 537 



Phylum 6 — Nemathelminthes (Roundworms) ________538 



Phylum 7- — Rotifera or Trochelminthes (Rotifers) ______ 539 



Phylum 8 — Echinodermata (Starfish, Sea Urchin, Sand Dollar, etc.) _ 540 



Phylum 9 — Annelida (Segmented Worms) ________ 540 



Phylum 10 — Mollusca (Oysters, Clams, Squids, Snails, Devilfish, Oc- 

 topus) ______________ 541 



Phylum 11 — Arthropoda (Crayfish, Lobster, Centipede, Millipede, In- ■ 



sects. Ticks, Mites, Spiders, etc.) ______ 543 



Class Crustacea ________________ 543 



Class Diplopoda and Class Chilopoda _________ 544 



Class Arachnoidea ______________ 544 



Class Insecta or Hexapoda ____________ 547 



General Usefulness of Beneficial Insects _______ 547 



Injurious or Detrimental Insects in General ______ 549 



Economic Importance of Representatives of the Orders of Insects 550 

 Phylum 12 — Chordata (Lampreys, Sharks, Fishes, Frogs, Reptiles, 



Birds, and Mammals) _________ 572 



Class Cyclostomata (Cyclostomes) _ _ _ _ _ _ _ _ _ 573 



Class Elasmobranchii (Sharks) ___________ 573 



Class Pisces (True Fishes) ____________ 573 



Class Amphibia (Frogs and Toads) _ _ _ _ _ _ _ _ _ 573 



Class Reptilia (Reptiles) ____________ 573 



Class Aves (Birds) ______________ 574 



Class Mammalia (Mammals) ___________ 574 



27. Homology; Analogy; Autotomy; Regeneration; Morphogenesis 576 



28. Early Man and His Records ____________ 585 



History of Mankind and Human Society _________ 585 



Early Man and His Records ____________ 586 



Java Ape-Man (Pithecanthropus erectus) ________ 586 



Peking Man (Sinanthropus pekingensis) ________ 588 



Piltdown Man or Dawn Man (Eoanthropus dawsoni) _ _ _ _ 588 



Heidelberg Man ( Palaenthropus [Homo] Heidelbergensis) _ _ _ 588 



Neanderthal Man (Homo neanderthalensis) _______ 589 



Cro-Magnon Man or Modern Man (Homo sapiens) _____ 589 



