obex: 19-107, 19-121, 19-156, 20-97, 20-99, 20-101, 20-103, 20-105, 21-87, 21-91, 21-95, 22-410, 23-41, 23-42

obicularis oculi muscle: 23-71

oblique fissure: 18-517, 18-523, 18-529, 18-535, 18-541, 18-543, 19-485, 19-491, 19-499, 19-506, 19-512, 19-520, 19-534, 20-255, 20-257, 20-259, 20-261, 20-263, 20-265, 20-267, 20-269, 21-255, 21-259, 21-261, 22-1159, 22-1169, 22-1189, 22-1199, 22-1209, 22-1239, 22-1250, 22-1259, 22-1270, 22-1280, 22-1299, 23-115, 23-116, 23-118, 23-119, 23-120, 23-121, 23-124, 23-126, Atlas 7-3, Atlas Fig. 7-22-33, Atlas Fig. 8-12-20, Atlas Fig. 8-13-21, Atlas Fig. 8-13-22

oblique pericardial sinus: 21-257

oblique section through surface ectoderm: 18-17, 18-827, 18-831, 18-835, 20-1, 20-3, 23-1

oblique sinus: Atlas Fig. 6-16-22, Atlas Fig. 7-22-33

obliquus capitis inferior muscle: 22-639, 23-66, Atlas Fig. 8-8-12, Atlas Fig. 8-9-13

obliquus capitis superior muscle: 22-506, 22-542, 22-589, 22-609, Atlas Fig. 8-7-10, Atlas Fig. 8-8-11

obturator canal: 22-1877

obturator externus muscle: 22-1914, 23-196, Atlas Fig. 8-19-34, Atlas Fig. 8-20-36

obturator foramen: 22-1914, Movie 20-6, Movie 22-5, Atlas Fig. 8-19-34, Atlas Fig. 8-20-35

obturator internus muscle: 22-1914, 22-1925, 22-1937, 23-200, Atlas Fig. 8-20-36

obturator nerve: 18-695, 18-712, 19-815, 20-343, 21-335, 22-1877, 22-1889, Atlas Fig. 7-29-48, Atlas Fig. 8-19-33

occipital cartilage: Fig. 23-22

occipital condyle: 19-240, 20-143, 21-139, 23-61, 23-62, Movie 23-4

occipital dermatome: Atlas Fig. 5-2a, Atlas Fig. 5-7-4, Atlas Fig. 5-8-5, Atlas Fig. 5-8-6, Atlas Fig. 5-9-7, Atlas Fig. 5-10-9

occipital lamina: 18-331, Atlas Fig. 7-12-13

occipital lobe area: Atlas Fig. 8-1b

occipital myotome: 16-227, 16-231, 16-235, 16-247, 16-255, 16-267, Atlas 6-9, Atlas Fig. 5-7-4, Atlas Fig. 5-8-6, Atlas Fig. 5-9-8, Atlas Fig. 5-10-9, Atlas Fig. 6-8-6, Atlas Fig. 6-9-7

occipital neural crest: Atlas Fig. 4-7-10, Atlas Fig. 4-8-11, Atlas Fig. 4-8-12

occipital sclerotome: Atlas Fig. 5-10-9

occipital sclerotomes: Atlas Fig. 6-9-8, Atlas Fig. 6-10-9

occipito-axial joint: Fig. 23-23, Fig. 23-24

oculomotor nerve: Atlas 7-2

oculomotor nerve (CN III): 16-199, 16-203, 16-219, 16-227, 16-231, 16-243, 16-251, 16-255, 16-263, 16-267, 16-275, 16-279, 17-172, 17-187, 17-191, 17-202, 17-206, 17-210, 17-217, 17-223, 17-236, 17-253, 17-266, 17-279, 17-290, 17-303, 17-307, 18-137, 18-140, 18-145, 18-150, 18-154, 18-160, 18-166, 18-171, 18-177, 18-183, 18-201, 18-210, 18-221, 19-191, 19-205, 19-233, 19-261, 19-274, 19-289, 19-296, 19-303, 20-65, 20-67, 20-69, 20-71, 20-75, 20-79, 20-81, 20-87, 20-89, 20-93, 20-97, 20-99, 20-105, 21-65, 21-67, 21-69, 21-71, 21-75, 21-79, 21-83, 21-85, 21-87, 21-89, 21-105, 21-109, 21-115, 22-460, 22-493, 22-600, 22-620, 22-639, 22-680, 23-32, 23-33, 23-34, 23-35, 23-36, 23-37, 23-38, 23-39, 23-41, 23-45, 23-47, 23-49, 23-51, 23-53, 23-54, Fig. 16-6, Movie 16-11, Movie 18-9, Movie 19-10, Atlas Fig. 6-2a, Atlas Fig. 6-8-5, Atlas Fig. 6-8-6, Atlas Fig. 6-9-7, Atlas Fig. 6-9-8, Atlas Fig. 6-10-9, Atlas Fig. 7-2a, Atlas Fig. 7-8-5, Atlas Fig. 7-8-6, Atlas Fig. 7-9-7, Atlas Fig. 7-10-10, Atlas Fig. 7-11-11, Atlas Fig. 8-4-3, Atlas Fig. 8-4-4, Atlas Fig. 8-5-5, Atlas Fig. 8-5-6, Atlas Fig. 8-6-7

oculomotor nucleus: 20-61, 20-63, 22-241, 22-253

olfactory area: 14-389, 14-419, 14-429, 16-415, 16-425, 16-433, 16-437, 16-445, Fig. 13-19, Fig. 14-10, Atlas 7-2

olfactory artery

olfactory bulb: 18-371, 18-377, 19-402, 19-422, 19-436, 20-149, 20-151, 20-153, 20-161, 20-163, 21-165, 21-167, 21-169, 21-171, 22-890, 22-899, 22-919, 22-930, 23-69, 23-71, 23-72, Atlas 7-2, Atlas 8-2, Atlas Fig. 8-1b, Atlas Fig. 8-2a, Atlas Fig. 8-6-8

olfactory epithelium: Atlas Fig. 6-14-18, Atlas Fig. 7-15-19, Atlas Fig. 8-7-9

olfactory epithelium (placode): 21-165, 21-167, 21-169, 21-171, 21-175, 22-880, 22-899, 22-919, 23-71, 23-72

olfactory evagination: Fig. 17-6

olfactory filia (CN I): 17-427, 17-463, 18-371, 18-383, 19-387, 19-394, 19-402, 19-408, 20-155, 20-161, 21-163, 21-165, 21-167, 21-171, 22-880, 22-899, 22-919, 23-71, 23-72, Fig. 16-6, Atlas Fig. 6-2a, Atlas Fig. 6-14-18

olfactory nerve: Atlas Fig. 7-16-21

olfactory nerve (CN I): 15-213, Fig. 18-3, Atlas Fig. 7-2a, Atlas Fig. 7-15-19, Atlas Fig. 8-6-8

olfactory placode: 11-52, 19-408, Movie 11-1, Atlas 5-3, Atlas 6-1, Atlas 6-3, Atlas Fig. 5-15-19

olfactory placode area: Atlas Fig. 5-1a

olfactory sac: 16-457

olfactory-striatal commissural field: Fig. 17-6

olfactory ventricle: 20-159, 22-909, 23-69, Atlas Fig. 8-6-8

omental bursa: Atlas 6-6

omental foramen: 15-318, 15-330, 15-334

omohyoid muscle

omphaloenteric duct: 13-157, 13-158, 13-159, 13-160, 13-162, 13-163

omphalomesenteric (superior mesenteric) vein: 14-663, 14-683, 14-701, 14-722, 14-725, 14-741, 14-751, 14-781, 14-791, 14-801, 14-811

omphalomesenteric artery: 18-577, 18-583, 18-590, 18-594, 18-601, 18-612, 18-619, 18-625, 18-631, 20-317, 20-319, 20-321, 20-323, 20-327, 20-329, 20-331, 22-1519, 22-1529, Movie 20-8, Movie 20-20

omphalomesenteric vein: 14-731, Movie 20-9, Movie 20-20

omphalomesenteric vessels: 19-646, 19-662, 19-670, 19-678, 19-686, 19-694, 19-702, 19-710, 19-718

oocyte: Fig. 1-35, Fig. 2-34, Fig. 2-45, Fig. 2-48

ooplasm: Fig. 1-11

ootid

opening of auditory tube: Atlas Fig. 8-2a

opening of female duct into peritoneal cavity: Atlas Fig. 7-3

open otic vesicle: 12-60

opercular fold: Fig. 16-3, Atlas 6-1, Atlas 7-1, Atlas Fig. 6-1a, Atlas Fig. 6-11-12

ophthalmic nerve: Atlas Fig. 6-10-10, Atlas Fig. 7-10-10, Atlas Fig. 7-12-13

ophthalmic nerve (CN V₁): 14-216, 14-226, 14-236, 15-132, 16-283, 16-287, 16-291, 17-290, 17-296, 17-303, 18-313, 18-325, 19-296, 19-303, 19-310, 19-328, 20-133, 20-135, 20-139, 20-141, 21-141, 21-145, 21-149, 22-749, 22-759, 23-59, 23-60, 23-61, 23-62, Fig. 16-6, Movie 14-5, Movie 18-9, Movie 19-10, Atlas Fig. 6-2a, Atlas Fig. 6-10-9, Atlas Fig. 7-2a, Atlas Fig. 8-5-6, Atlas Fig. 8-6-7

ophthalmic nerve and ciliary ganglion: Atlas Fig. 7-11-11

ophthalmic part: Atlas Fig. 5-2a

ophthalmic part of trigeminal neural crest: Atlas Fig. 5-8-6, Atlas Fig. 5-9-7

optic area: Movie 10-1, Atlas 6-2, Atlas 7-2, Atlas 8-2, Atlas Fig. 4-1, Atlas Fig. 4-4-1, Atlas Fig. 4-4-2

optic canal: 20-135, 20-137, 20-139, 22-769, 23-61, 23-62, 23-63, Movie 23-4, Atlas 8-9

optic cavity: Atlas Fig. 5-12-13, Atlas Fig. 5-13-15

optic chiasma: Atlas Fig. 7-12-13, Atlas Fig. 8-6-7

optic chiasma (chiasmatic plate): 15-164, 15-168, 15-172, 15-176, 15-180, 15-184, 16-331, 16-339, 16-345, 16-355, 16-363, 16-367, 16-375, 16-379, 17-326, 17-356, 17-363, 18-320, 19-317, 20-137, 20-139, 20-141, 21-143, 21-145, 22-739, 22-759, 22-769, 23-59, 23-60, 23-61, Fig. 14-9, Fig. 14-10, Fig. 17-6, Atlas 4-1, Atlas 5-2, Atlas 6-2, Atlas 7-2, Atlas 8-2, Atlas Fig. 8-5-6

optic cup: 14-277, 14-300, 15-164, 15-168, Fig. 16-3, Movie 14-5, Movie 14-6, Movie 14-8, Movie 16-1, Movie 16-10, Movie 16-11, Movie 17-1, Movie 17-6, Movie 18-9, Movie 19-10, Movie 20-12, Movie 21-2, Movie 21-5, Atlas 4-1, Atlas 5-7, Atlas 6-1, Atlas 6-11, Atlas 6-2, Atlas 6-3, Atlas 6-9, Atlas 7-1, Atlas 7-10, Atlas 7-12, Atlas 7-2, Atlas Fig. 6-11-12, Atlas Fig. 7-12-13

optic disc: Fig. 23-32

optic evagination: 13-100, 13-101, Fig. 11-2, Fig. 13-19

optic groove: 14-349, 14-359, 14-369, 16-331, 16-339, 18-292, 18-302, 18-320, 19-310, 20-131, 20-133, 20-137, 21-139, 21-141, 21-147, 23-52, 23-53, 23-54, 23-55, 23-57, 23-58, 23-60, 23-61, Fig. 14-9, Fig. 14-10, Fig. 17-6, Movie 10-1, Atlas 4-1, Atlas 5-8, Atlas 6-2, Atlas 8-2, Atlas Fig. 4-1, Atlas Fig. 4-2a, Atlas Fig. 4-4-1, Atlas Fig. 6-11-12, Atlas Fig. 7-10-10, Atlas Fig. 7-11-11, Atlas Fig. 8-4-4, Atlas Fig. 8-5-5, Atlas Fig. 8-5-6

optic nerve (CN II): 19-328, 19-338, 19-352, 20-139, 20-147, 20-149, 21-149, 21-157, 21-159, 21-163, 22-769, 22-779, 22-789, 22-800, 22-819, 22-829, 22-859, 23-62, 23-63, 23-66, 23-67, 23-68, Fig. 23-33, Movie 20-12, Atlas Fig. 8-2a, Atlas Fig. 8-6-7, Atlas Fig. 8-6-8

optic nerve area: Atlas Fig. 8-1b

optic nerve primordium (CN II) [diencephalon (D1)]: 11-16, 11-19, 11-22, 11-28, 11-34

optic nerve primordium (CN II) [primordial diencephalon (D1)]: 10-20

optic stalk: Atlas Fig. 5-12-13, Atlas Fig. 6-11-12, Atlas Fig. 6-12-14, Atlas Fig. 7-12-13, Atlas Fig. 7-12-14

optic stalk (CN II): 13-87, 13-88, 13-89, 13-90, 13-99, 13-100, 14-300, 14-309, 14-338, 15-160, 15-164, 15-168, 15-172, 16-327, 16-331, 16-335, 16-339, 16-363, 17-337, 18-320, 18-331, 18-336, 18-343, Fig. 14-10, Fig. 16-4, Fig. 16-6, Movie 14-5, Movie 17-5, Atlas Fig. 5-1b, Atlas Fig. 5-2a, Atlas Fig. 6-1b, Atlas Fig. 6-2a, Atlas Fig. 7-2a

optic stalk and chiasma area: Atlas Fig. 7-1b

optic stalk lumen: Atlas Fig. 6-12-13

optic sulcus: 11-7, 11-10, 11-13, 11-16, 11-19, 11-22, 11-25, 11-28, 17-356, 17-363, Movie 11-1

optic sulcus [primordial diencephalon (D1)]: 10-19, 10-20

optic tract: 22-699, 22-709, 23-51, 23-53, 23-55, 23-57, Atlas Fig. 8-5-5

optic ventricle: 16-343, 18-320, 18-325, 19-328

optic vesicle: 13-85, 13-86, 13-90, 13-91, 13-92, 13-93, 13-94, 13-95, Atlas 5-2, Atlas 5-8, Atlas 6-11, Atlas Fig. 5-1b, Atlas Fig. 5-2a, Atlas Fig. 5-11-12, Atlas Fig. 5-12-13, Atlas Fig. 5-12-14

optic vesicle (D1): 12-45, 12-48, 12-57, 12-60, 12-63, 12-66, 12-69, Fig. 12-1, Fig. 12-2, Atlas 5-2, Atlas 5-8, Atlas 6-11

oral cavity: 14-244, 17-348, 18-359, 18-365, 18-371, 18-377, 18-383, 18-401, 19-352, 19-366, 19-394, 20-155, 20-167, 20-173, 20-179, 20-181, 20-185, 20-187, 21-179, 21-183, 21-185, 21-189, 21-191, 21-195, 22-829, 22-999, 22-1019, 22-1029, 22-1040, 22-1069, 23-76, 23-78, 23-82, 23-83, 23-84, 23-85, 23-89, Atlas 7-3, Atlas 8-3, Atlas Fig. 8-2a, Atlas Fig. 8-8-12, Atlas Fig. 8-9-14

oral fissure: 13-73, 13-77, 13-79, 13-80, 13-81, 13-82, 13-83, 14-269, 14-277, 14-289, 14-300, 15-160, 16-351, 16-359, 16-363, 16-371, 16-379, 16-387, 16-391, 17-380, 17-397, 18-395, 18-401, 20-189, 20-193, 20-195, 21-191, 21-195, 21-199, 21-203, 22-1040, 23-93, Movie 14-1, Movie 14-3, Movie 15-1, Movie 16-3, Movie 18-1, Movie 18-2, Movie 20-2, Atlas 5-3

oral membrane: Fig. 12-2

oral vestibule

orbicularis oculi muscle: 21-169, 23-76, Atlas Fig. 8-8-11

orbicularis oris muscle: Atlas Fig. 8-10-15

orbitosphenoid: 18-307, 18-313, 19-303, 19-310, 19-317, 20-133, 20-135, 20-137, 20-139, 20-143, 20-145, 21-139, 21-143, 21-145, 21-147, 22-759, 22-769, 22-779, Atlas 7-9, Atlas 8-9, Atlas Fig. 7-10-10, Atlas Fig. 7-11-11, Atlas Fig. 7-12-14, Atlas Fig. 8-5-6, Atlas Fig. 8-6-7

organelles: Fig. 2-29, Fig. 2-45, Fig. 2-55

origin of left recurrent laryngeal nerve from the left vagus nerve: Atlas Fig. 7-19-27

origin of nasolacrimal duct: Atlas Fig. 7-14-18, Atlas Fig. 7-15-19

origin of the vertebral artery: Atlas Fig. 7-18-25

oronasal cavity: 15-156, 15-160, 15-168, 15-172, 16-311, 16-315, 16-319, 16-323, 16-327, 16-331, 16-335, 16-339, 16-343, 16-351, 16-359, 16-367, 16-371, 16-379, 16-387, 17-283, 17-290, 17-348, 17-356, 17-367, 17-391, 17-397, 21-163

oronasal membrane: 19-359, 19-366, Atlas 7-3, Atlas Fig. 7-14-18

oropharyngeal junction: Atlas Fig. 5-10-9

oropharyngeal membrane: 9-12, 9-13, 9-14, 11-58, 11-61, 12-78, Atlas 3-2-1, Atlas 4-1, Atlas 5-3, Atlas Fig. 4-2a, Atlas Fig. 4-4-3

oropharynx: 15-128, 17-290, 17-296, 17-313, 18-320, 20-155, 21-157, 22-789, 23-69, 23-70, 23-72, 23-73, Atlas 8-3, Atlas Fig. 8-8-12

ossifying occipital tectum: 23-19

osteogenic layer: 18-95, 18-104, 18-113, 18-118, 18-133, 18-145, 18-154, 18-171, 18-183, 18-201, 18-205, 18-215, 18-221, 18-238, 18-244, 18-250, 18-267, 18-377, 18-395, 18-443, 18-451, 18-547, 18-559, 18-648, 18-707, 18-773, 18-786, 18-803, 18-809, 19-66, 19-74, 19-81, 19-90, 19-114, 19-142, 19-152, 19-156, 19-163, 19-170, 19-177, 19-226, 19-233, 19-254, 19-261, 19-274, 19-296, 19-352, 19-394, 19-450, 19-464, 19-471, 19-478, 19-618, 19-654, 19-797, 19-824, 19-833, 19-887, 20-9, 20-11, 20-13, 20-15, 20-17, 20-19, 20-21, 20-23, 20-25, 20-27, 20-31, 20-33, 20-37, 20-41, 20-45, 20-51, 20-53, 20-55, 20-59, 20-63, 20-69, 20-71, 20-73, 20-77, 20-79, 20-83, 20-85, 20-87, 20-89, 20-91, 20-93, 20-95, 20-97, 20-105, 20-109, 20-143, 20-149, 20-153, 20-157, 20-171, 20-191, 20-283, 20-351, 20-385, 20-387, 20-389, 20-391, 20-393, 21-7, 21-9, 21-11, 21-13, 21-15, 21-18, 21-19, 21-21, 21-23, 21-25, 21-27, 21-31, 21-33, 21-37, 21-41, 21-45, 21-47, 21-49, 21-51, 21-53, 21-57, 21-59, 21-64, 21-67, 21-69, 21-79, 21-81, 21-83, 21-85, 21-87, 21-89, 21-103, 21-105, 21-109, 21-133, 21-143, 21-147, 21-151, 21-155, 21-157, 21-165, 21-177, 21-195, 21-215, 21-225, 21-239, 21-371, 21-373, 21-375, 21-379, 21-383, 21-387, 21-389, 21-391, 22-109, 22-229, 22-253, 22-436, 22-445, 22-460, 22-518, 22-580, 22-600, 22-639, 22-819, 22-829, 22-849, 22-890, 22-1009, 22-1040, 22-1419, 22-1481, 22-1749, 22-1987, 22-2063, 22-2075, 22-2088, 22-2093, 22-2111, 22-2129, 22-2136, 22-2145, 22-2151, 23-2, 23-3, 23-4, 23-5, 23-6, 23-7, 23-8, 23-9, 23-10, 23-11, 23-12, 23-13, 23-15, 23-16, 23-17, 23-19, 23-21, 23-28, 23-30, Atlas Fig. 8-3-1

osteogenic membrane: 18-425, Atlas 8-9, Atlas Fig. 8-6-7

ostium primum: 13-96, 13-97, 13-99, 13-100, Atlas 5-6, Atlas 6-7, Atlas 7-8, Atlas Fig. 5-13-15, Atlas Fig. 5-14-17, Atlas Fig. 5-15-19, Atlas Fig. 5-16-21, Atlas Fig. 6-15-19

ostium secundum: Atlas Fig. 7-21-31

ostium secundum area: Atlas Fig. 7-20-30

otic capsule: 14-101, 14-186, 14-196, 15-107, 15-111, 16-163, 16-171, 16-183, 16-187, 16-227, 18-233, 18-261, 20-137, 20-143, 22-460, 22-699, 23-53, 23-55, 23-59, 23-62, Atlas 6-11, Atlas 6-8, Atlas 7-12, Atlas 7-9, Atlas 8-12, Atlas 8-8, Atlas 8-9, Atlas Fig. 7-9-7, Atlas Fig. 7-10-10, Atlas Fig. 8-5-5, Atlas Fig. 8-6-7, Atlas Fig. 8-7-10

otic cup: Atlas Fig. 6-1a

otic disc: Fig. 11-3, Fig. 11-6, Fig. 11-7, Fig. 11-8

otic ganglion: 19-296, 21-155, 22-690, 22-729, 22-759, 23-63, Atlas 7-2, Atlas Fig. 7-11-11, Atlas Fig. 8-7-9

otic pit: 12-60, 12-63, 12-66, Movie 12-1

otic placode: 10-92, 10-93, 10-96, 10-99, 10-102, 10-104, 10-105, 10-109, 10-111, 10-112, 10-116, 10-120, 10-121, 10-124, 10-126, 11-79, 11-82, 11-85, 11-88, 11-91, 11-94, 11-97, 11-100, 11-103, 11-106, 11-109, 11-112, Movie 11-1, Atlas Fig. 4-1, Atlas Fig. 4-5-6

otic plate: Fig. 9-2, Fig. 11-19

otic prominence: Atlas Fig. 4-1, Atlas Fig. 5-1a

otic vesicle: 12-69, 12-81, 13-23, 13-24, 13-25, 13-26, 13-27, 13-28, 13-29, 13-30, 13-31, 13-32, 13-33, 13-34, 13-39, 13-40, 13-41, Fig. 12-2, Movie 14-8, Movie 16-10, Movie 16-11

otocoele: Atlas Fig. 5-6-2

otocyst: Fig. 13-11, Atlas 5-2, Atlas 5-6, Atlas 5-8, Atlas 6-11, Atlas 6-2, Atlas 6-8, Atlas Fig. 5-2a, Atlas Fig. 5-5b, Atlas Fig. 5-6-2, Atlas Fig. 5-7-3, Atlas Fig. 5-7-4

outer cell mass: Atlas Fig. 1-3a

outer layer (pigmented): Atlas Fig. 6-11-12

outline of suprarenal gland: Atlas Fig. 7-2a

ovary: 18-653, 18-659, 18-665, 18-671, 18-676, 21-311, 21-317, 21-319, 21-321, 21-323, 21-325, 21-327, Atlas 8-4

ovulation history: Fig. 2-78, Fig. 3-1-76

ovum