12 CONTENTS. 



CHAPTER XY. 



MOVEMENTS GENEBAL PEOPEETIES OF CONTKACTILE TISSUES. 



Amorphous contractile substance Ciliary movements Movements due to elas- 

 ticity Varieties of elastic tissue Muscular movements Physiological 

 anatomy of the involuntary muscles Mode of contraction of the involun- 

 tary muscular tissue Physiological anatomy of the voluntary muscles 

 Primitive fasciculi Sarcolemma Fibrillse Fibrous and adipose tissue in 

 the voluntary muscles Connective tissue Blood-vessels and lymphatics 

 of the muscular tissue Connection of the muscles with the tendons 

 Chemical composition of the muscles Physiological properties of the mus- 

 cles Elasticity Muscular tonicity Sensibility of the muscles Muscular 

 contractility, or irritability, Page 436 



CHAPTER XYI. 



MUSCTJLAE CONTRACTION PASSIVE OKGANS OF LOCOMOTION. 



Changes in the form of the muscular fibres during contraction Secousse, 

 Zuckung, or spasm Spasm produced by artificial excitation Mechanism 

 of prolonged muscular contraction Tetanus Electric phenomena in the 

 muscles Muscular effort Passive organs of locomotion Physiological 

 anatomy of the bones Fundamental substance Haversian rods Haver- 

 sian canals Lacunae Canaliculi Bone-cells, or corpuscles Marrow of 

 the bones Medullocells Myeloplaxes Periosteum Physiological anat- 

 omy of cartilage Cartilage-cavities Cartilage-cells Fibro-cartilage, 468 



CHAPTER XVII. 



VOICE AND SPEECH. 



Sketch of the physiological anatomy of the vocal organs Vocal chords Mus- 

 cles of the larynx Crico-thyroid muscles Arytenoid muscle Lateral 

 cricc-arytenoid muscles Thyro-arytenoid muscles Mechanism of the pro- 

 duction of the voice Appearance of the glottis during ordinary respira- 

 tion Movements of the glottis during phonation Variations in the quah'ty 

 of the voice, depending upon differences in the size and form of the larynx 

 and the vocal chords Action of the intrinsic muscles of the larynx in 

 phonation Action of the accessory vocal organs Mechanism of the dif- 

 ferent vocal registers Mechanism of speech, 490 



