TABLE OF CONTENTS. 11 



SECTION V. 



PHYSIOLOGY OF THE ORGANS OF CIRCULATION OF THE 

 BLOOD AND LYMPH. 



PAGE 



Chapteh XXV. — The Velocity and Pressure of the Blood Flow. . 479 



The Circulation as Seen Under the Microscope, 479. — The Velocity of the Blood 

 Flow, 480. — Mean Velocity in the Arteries, Veins, and Capillaries, 483.^-Cau8e 

 of the Variations in Velocity, 485. — Variations of Velocity with the Heart-beat 

 or Change* in the Blood-vessels, 485. — Time Necessary for a Complete Cir- 

 culation of the Blood, 48G. — The Pressure Relations in the Vascular System, 486. — 

 Methods of Recording Blood-pressure, 487. — Systolic, Diastolic, and Mean 

 Arterial Pressure, 490. — Method of Measuring Systolic and Diastolic Pressure 

 in Animals, 492. — Data as to the Mean Pressure in Arteries, Veins, and Capillaries, 

 495. — Methods of Determining Blood-pressure in the Large Arteries of Man, 

 497. — Normal Arterial Pressure in Man and its Variations, 503. — The Method 

 of Deternuning Venous Pressures and Capillary Pressures in Man, 504. 



Chapter XXV L — The Physical Factors Concerned in the Produc- 

 tion OF Blood-pressure and Blood-velocity 507 



Side Pressure and Velocity Pressure, 507. — The Factors Concerned in Producing 

 Normal Pressure and Velocity, 510. — General Conditions Influencing Blood- 

 pressure and Blood-velocity, 511. — The Hydrostatic Effect, 512. — Accessory- 

 Factors Aiding the Circulation, 514. — The Conditions of Pressure and Velocity 

 in the Pulmonary Circulation, 515. — Variations of Pressure in the Pulmonary 

 Circuit, 516. 



Ch.\pter XXVIL— The Pulse 517 



General Statement, 517. — Velocity of the Pulse Wave, 518. — Form of the Pulse 

 Wave, Sphygmography, 520. — Explanation of the Catacrotic Waves, 522. — 

 Anacrotic Waves, 523. — The Kinds of Pulse in Health and Disease, 524. — Venous 

 Pulse, .525. 



Chapter XXVIIL — The He.\rt-beat 530 



General Statement, 530. — Musculature of the Auricles and Ventricles, 530. — 

 The Nodal Tissue and Conducting System, 533. — The Sequence of the Heart-beat, 

 536. — Heart-block, 53S. — The Electrical Variation, 539.— Change of Form during 

 Systole, 541. — The Apex-beat, 542. — Cardiogram, 543. — Intraventricular Pressure 

 tluring Svstole, 544. — The Volume Curve and the Ventricular Output, 546. — The 

 Heart Sounds, 549.— The Third Heart Sound, 549. — Events Occurring during 

 a Cardiac Cycle, 551. — Time Relations of Systole and Diastole, 652. — ^Average 

 Capacity of Ventricle and Work Done by the Heart, 553. — The Efficiency and 

 Adaptability of the Heart, 555. — Coronary Circulation during the Heart-beat, 

 .557. — Suction-pump Action of the Heart, 558. — Occlusion of the Coronarj- 

 Vessels, 559. — Fibrillar Contractions of Heart Muscle, 559. 



Chapter XXIX. — The Cause of the Heart-beat. Properties of 



the Heart Muscle 561 



General Statement, 561. — The Neurogenic and Myogenic Theories of the Heart- 

 beat, 570. — Automaticity of the Heart, 563. — Action of Calcium, Potassium, 

 and Sodium Ions on the Heart, 564. — Connection of Inorganic Salts with the 

 Causation of the Beat, 566. — Maximal Contractions of the Heart, 567. — Re- 

 fractory Period of the Heart-beat, 569. — The Compensatory Pause, 570. — 

 Tonicity of the Heart Muscle, 570. 



Chapter XXX. — The Cardiac Nerves and Their Physiological 



Ac-noN 572 



Course of the Cardiac Nerves, 572. — Action of the Inhibitory Fibers, 572. — 

 Analysis of the Inhibitory Action, 574. — Effect of Vagus on the Auncle and 

 the Ventricle, 576. — Escape from Inhibition, 576. — Reflex Inhibition of the 

 Heart-beat, the Cardio-inhibitory Center, 577. — The Tonic Activity of the 

 Cardio-inhibitory Center, 578. — The Action of Drugs on the Inhibitory Appara- 

 tus, 580. — The "Nature of Inhibition, 580. — Course of the Accelerator Fibers, 

 .582. — ^Action of the Accelerator Fibers, 584. — Tonicity of the Accelerators and 

 Reflex Acceleration, 584. — The Accelerator Center, 586. 



Chapter XXXI. — The Rate of the Heart-beat and Its Variations 



under Normal Conditions 587 



Variations in Rate with Sex, Size, and Age, 587. — Variations Through the Extrinsic 

 Cardiac Nerves, 588. — Variations with Blood-pressure, 588. — With Muscular 

 Exercise, 589. — With Temperature of the Blood, 590. 



