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respiratory part of, 804
septum of, 802

surgical anatomy of, 1378

veins of, 806

vessels of, 805

vestibule of, 802
Nostril, 799

Notch, acetabular, of ischium, 232

variations in, 281

cardiac, of lung, 1095

of cerebellum, 574
ethmoidal, 116

greater sciatic, of ilium, 229
infra-sternal, 1397, 1407

intercondylic, of femur, 243
jugular, 107

mandibular, 156
nasal, 115
pterygoid, 137
pterygo-palatine, 151
radial, 211

of Rivinus, 834
of sacrum, 96
scapular, 201, 203
great, 202
sciatic, 229, 232
semilunar, 211
of spleen, 1352
supraorbital, 116
suprasternal, 107
ulnar of radius, 215
umbilical, 1191
Notochord, 23, 24, 290
formation of, 24

remnants of, 25
Nuchal furrow, 1395
lines, 166, 171

of occipital bone, 121
plane of occipital bone, 121
Nuck, canal of, 1319
Nuclear juice, 8

layer of retina, 816, 817
membrane, 8, 9
Nucleolus, 8, 9, 10

false, 8

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Esophagus, cervical (contd.), surgical anatomy

of, 1393

constrictions of, 1151
development of, 45, 1249
diaphragmatic part of, 1152
distensibility of, 1407
glands of, 1155

relations of, 1151, 1152, 1153
structure of, 1153
surgical anatomy of, 1407

thoracic part of, 1152

variations in, 1153

vessels and nerves of, 1155
Olecranon, 210
fossa, 208
topography of, 1449
Olfactory area, 500, 622
bulb, 622, 623

development of, 622
morphology of, 622

structure of, 623
bundle, 627
cells, 805

cleft, 1378
ganglion, 622

morphology of, 622

glands, 804
glomeruli, 623

groove, 140, 141, 179
hairs, 805

lobe, 624

development of, 624

relation of, to anterior cerebral commissure,

626

nerve, 767, 768, 805

central connexions of, 623

development of, 682

neurones, 625

organ, 799

for receptive impressions, 625.
pits, 49, 682
sulcus, 666

tract, 622, 623

development of, 622
structure of, 623

triangle, 623

tubercle, 623

Oligolecithal ovum, 14
Olivary nucleus, 555

Olive of medulla oblongata, 547

Omental bursa, 1162, 1238
tuberosity of liver, 1193

of pancreas, 1206
Omentum, 1162

gastro-colic, 1162
gastro-hepatic, 1162
gastro-splenic, 1162

development of, 1253

relation of, to omental bursa, 1239

greater, 1162, 1241

development of, 1253

functions of, 1242

relation of, to duodenum, 1186
to omental bursa, 1239
to transverse colon, 1239
lesser, 1162, 1197, 1241

development of, 1253

relation of, to omental bursa, 1239

Omo-hyoid muscle, 459

action of, 394

nerve-supply of, 394
Ontogeny, 1

Oocyte, 12

of first order, 12
of second order, 15
Oogonia, 12, 15
Oolemma, 13

Opening of subarachnoid part of brain,
1362

Opercula insulæ, 655
orbital, 655

superior, 655
temporal, 655
Ophryon, 285
Ophthalmic artery, 902

abnormalities of, 1054

nerve, 772

morphology of, 797
veins, 968
Opisthion, 178, 183

Opponens digiti quinti muscle, 393

action of, 394

nerve-supply of, 394
Opponens pollicis muscle, 392
action of, 393
nerve-supply of, 393
Optic axis, 807
chiasma, 541, 619
decussation in, 769

development of, 609, 682, 826
morphology of, 798

commissure, 619
cup, 682, 826

of optic disc, 815
disc, 815
foramen, 180

abnormalities of, 278

groove, 135

nerve, 541, 768

deep connexions of, 620
development of, 33, 609, 682
morphology of, 798
papilla, 815

in retina, 816

radiation, 620, 643, 658
recess, 618
stalk, 682, 825, 826

morphology of, 798

tract, 541, 619

central connexions of, 619
cortical connexions of, 620

vesicle, 825

pigmentary layer of, 825
Ora serrata, 815

structure of, 815

Oral part of the pharynx, 1144, 1145
Orbicularis oculi muscle, 450
Orbicularis oris muscle, 450

action of, 452
nerve-supply of, 452
Orbiculus ciliaris, 812
Orbit, 160, 162

fascia of, 452

floor of, 162
lateral wall of, 162
medial wall of, 163
muscles of, 452
action of, 454

morphology of, 496
nerve-supply of, 454

roof of, 160

veins of, 968

Orbital artery of middle meningeal, 898
of superficial temporal, 897

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Nerve or Nerves (contd.)—
lingual, 1131

surgical anatomy of, 1375
in tongue, 1131
of glossopharyngeal, 780
communications of, 780
morphology of, 796
of hypoglossal, 795
of vagus, 788
long scrotal, 739
thoracic, 702

to longus colli muscle, 468
lumbar, 719

anterior rami, 719
posterior rami, 690
lumbo-inguinal branch of genito-femoral,

722

to lumbrical muscles, of foot, 734, 735
of hand, 706, 709

of lung, 791

mandibular, 778

marginal, of mandible, 784
masseteric, 779

mastoid, 695

maxillary, 775

meatus acoustici externi, 780
medial cutaneous, of the arm, 710

of the calf, 732

of forearm, 709
of thigh, 724, 725
median, 705

branches in the forearm, 705
in hand, 706
communications, 705, 707
course of, 705

cutaneous branches, 706
muscular branches, 705

palmar ramus, 705

surgical anatomy of, at elbow, 1451

in arm, 1448

volar interosseous nerve of forearm, 705

of membrana tympani, 836
meningeal, of vagus, 788
(middle), 775

mental, 780

to muscles of abdominal wall, 485

of arm, 381

of back, 439

of buttock, 418

of face, 452

of foot, 425

of forearm, 400

of hand, 400

of hyoid bone, 460

of iris, 814

of leg, 435

of lower limb, 718

of mastication, 457

of orbit, 454

of pectoral region, 369

of pelvis, 494

of perineum, 489
of pinna, 830

prevertebral muscles, 470
of shoulder, 375, 376, 377
of soft palate, 786, 788
of thigh, 418

of thorax, 474

of tongue, 463

between trunk and upper limb,

372

of upper limb, 700

Nerve or Nerves (contd.)—
musculo-cutaneous, 704
variations of, 752
to mylo-hyoid, 780
nasal of infra-orbital, 777
lateral, 773

medial, 773

posterior inférior lateral, 778
superior lateral, 778
naso-ciliary, 773
naso-palatine, 778
to obliqui abdominis muscles, 716
obturator, 722

accessory, 726

to obturator externus muscle, 723
internus muscle, 728

occipital, greater, 689

branch of posterior auricular, 783
occipital, small, 695

morphology of, 700
occipital third, 690
oculo-motor, 769

branches of, 770
communications of, 770
course of, 770
deep origin of, 603
development of, 796
morphology of, 796
superficial origin of, 769
œsophageal, from sympathetic, 760
from vagus, 789
olfactory, 767, 768, 805
development of, 622
morphology of, 797
origin of, 624, 628
termination of, 768
ophthalmic, 772
branches of, 772
frontal, 772
lacrimal, 772
supra-orbital, 772
supra-trochlear, 773
course of, 772
development of, 796
optic, 768

development of, 825
morphology of, 797
origin of, 658

retinal portion of, 815

orbital, of spheno-palatine ganglion, 778
palatine, 778

anterior, 778

middle, 778

posterior, 778
palpebral, 824

to parotid gland, 1137
patellar, 726

perforans coccygeus major, 738

perforating cutaneous, 737
pericardiac, 791

perineal, 737

of fourth sacral, 738

of posterior cutaneous nerve of thigh, 737
superficial, 739

to perineal muscles, 739

peripheral, development of, 679
peroneal anastomotic ramus, 730
peroneal, deep, 730

superficial, 731

to peroneus brevis, 731
longus, 731
petrosal, deep, 758, 777

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