X CONTENTS 



CHAPTEB VII 



PAGB 

 THE ACCESSORY EEPKODUOTIVB ORGANS" OP THE MALE AND THE MECHANISMS 



CONCERNED IN INSEMINATION - 239 



The Vesioulae Seminales— The Prostate Gland— Cowper's Glands— The 

 Copulatory Organ- The Mechanisms of Erection, Ejaculation, and 

 Retraction. 



6HAPTEk VIII 



THE BIOCHEMISTRY OF THE SEXUAL ORGANS 



273 



The Female Generative Organs : Mammals, Birds, Lower Vertebrates, 

 Invertebrates— The Male Generative Organs: The Semen— The 

 Chemistry of the Spermatozoon — The Biochemistry of Fertilisation. 



CHAPTER IX 



THE TESTICLE AND THE OVARY AS ORGANS OF INTERNAL SECRETION 320 



The Correlation between the Testis and the other Male Organs and 

 Characters — The Correlation between the Ovary and the other 

 Female Organs and Characters^The Factors which Determine the 

 Occurrence of Heat and Menstruation — The Function of the Corpus 

 Luteum — The Supposed Internal Secretion of the Uterus — The 

 Correlation between the Generative Organs and the Ductless Glands 

 — General Conclusions regarding the Internal Secretions of the 

 Ovary and the Testis — The Influence of the Reproductive Organs 

 and the Efleots of Castration upon the General Metabolism. 



CHAPTEB X 



FCBTAL NUTRITION : THE PLACENTA - - 393 



Part I. The Placenta as an Organ of Nutrition — I. Historical Survey — 

 ' II. Structure and Functions of the Epithelial Investment of- the Villi 

 —III. TheDecidua. 



Part II. The first Stages of Pregnancy : Placental Classification — I. The 

 Ovarian Ovum — II. The Fertilised Ovum and its Coverings — III. The 

 Uterine Mucosa — IV. Placental Classification. 



Part III. The Fcetal Membranes, the Yolk-sac, and the Placenta — 

 I. General Anatomy of the Foetal Membranes — II. The Nutritive 

 Importance of the Yolk-sac (Marsupialia, Ungulata, Oarnivora, 

 Probosoidea and Hyrax, Bodentia, Insectivora, Primates) — III. The 

 Placenta.in Indeciduata (Ungulata, Lemuroidea, Oetaoea, Sirenia, and 

 Edentata) — IV. The Placenta in Deciduata (Carnivora, Probosoidea, 

 Hyrax, Rodentia, Insectivora, Cheiroptera, Primates) — V. General 

 Considerations of Fcetal Nutrition and the Placenta: A. The Plan 

 of Placental Formation. B. The Nature of the Trophoblastic ' 

 Activity. 



CHAPTER XI 



THE CHANGES IN THE MATERNAL ORGANISM DURING PREGNANCY 514 



I. The Stimulus for the Maternal Changes during Pregnancy — II. Changes 

 in the Metabolism of the Mother during Pregnancy : A. The Source 

 of the Materials transferred to the New Organism. B. The Body- 

 Weight during Pregnancy. C. The Protein Meta,bolism in Pregnancy. 

 D. The Carbohydrate Metabolism in Pregnancy! ,E- The Metabolism 

 of Fats in Pregnancy. F. The Acid-Base Equilibrium in Pregnancy. 



0. The Metabolism of Metala and Salts in Pregnancy. H, Respira- 

 tory Exchange and Energy Metabolism during Pregnancy, 



1. Summary. K. Analogy between Metabolism of Pregnant and 

 Tumour-bearing Animals — UI. The Changes in the Maternal Tissues 

 during Pregnancy. 



