Embryology Sample Pictures Starfish Sea Urchin Frog Chick Pig Sample Pictures Chick 12 to 16 hours-wm Chick 28 hours-wm Chick 33 hours-wm Chick 48 hours-wm Chick 72 hours-wm Sea Urchin Pluteus Larva Starfish Unfertilized Frog, neural tube (c.s.) top Starfish EM0001 STARFISH, sperm smear showing structure of spermatozoa with unusually long tails  EM0002 STARFISH TESTIS, section of developing sperm in mature testis  EM0003 STARFISH OVARY, c.s. of developing mature eggs  EM0004 STARFISH, w.m. of unfertilized eggs showing the mature eggs  EM0005 STARFISH POLAR BODY, w.m. of polar body formation  EM0006 STARFISH EARLY CLEAVAGE, w.m. of eggs showing 1,2,4,8 and 16 cell stages  EM0007 STARFISH LATE CLEAVAGE, w.m. of eggs showing 32and 64 cell stages with formation of any earlyblastocoel  EM0008 STARFISH MORUL  EM0009 STARFISH BLASTULA, w.m. of egg showing the large blastocoel  EM0010 STARFISH EARLY GASTRULA, w.m. of early gastrula showing invagination in different stages  EM0011 STARFlSH LATE GASTRULA, w.m. of eggs in late gastrula stage  EM0012 STARFISH BIPINNARIA, w.m. of the free-swimming larva  EM0013 STARFISH DEVELOPMENT, w.m. of all stages from the unfertilized eggs through bipinnaria stage  top Sea Urchin EM0020 SEA URCHIN SPERM, smear showing structure of spermatozoa with unusually long tails  EM0021 SEA URCHIN TESTIS, section of developing sperm in mature testis  EM0022 SEA URCHIN OVARY, c.s. of developing mature eggs  EM0023 SEA URCHIN UNFERTILIZED EGG, w.m.  EM0024 SEA URCHIN EARLY CLEAVAGE, w.m. a combination mount of one cell to 16 blastomeres inclusive  EM0025 SEA URCHIN LATE CLEAVAGE, w.m. 32 and 64 cell stages included  EM0026 SEA URCHIN BLASTULA, w.m. showing blastocoel clearly  EM0027 SEA URCHIN EARLY GASTRULA, w.m. of early gastrula showing invagination of cells  EM0028 SEA URCHIN LATE GASTRULA, w.m.  EM0029 SEA URCHIN PLUTEUS, w.m.  EM0030 SEA URCHIN DEVELOPMENT, w.m. of all stages indevelopment through pluteus  top Frog EM0045 FROG EARLY CLEAVAGE, c.s. showing 4 -16 cells  EM0046 FROG LATE CLEAVAGE, c.s. showing 32 or 64 cells  EM0047 FROG EARLY BLASTULA, c.s. showing blastocoel in early formation  EM0048 FROG LATE BLASTULA, c.s. showing well-formed blastocoel and surrounding cells.  EM0049 FROG EARLY GASTRULA, l.s. showing the dorsal lip and the beginning of involution  EM0050 FROG YOLK PLUG, typical gastrula, l.s.demonstrating the stage after the formation of the ventral lip where yolk plug, blastopore, gastrocoele, ectoderm and endoderm are seen.  EM0051  FROG NEURAL PLATE, c.s. showing medullary plate at an early stage of development  EM0052 FROG NEURAL FOLD, Sections where neural folds and grooves are quite pronounced.  EM0053 FROG TRANSITION, c.s. of transition between neuralfold and neural tube  EM0054 FROG NEURAL TUBE, c.s. showing neural folds completely fused to form the neural tube.  EM0055 Frog, neural tube c.s. EM0064 Frog, 4mm, w.m. EM064A Frog, 4mm, serial cs EM0065 FROG (7 mm), w.m.  EM0066 FROG (7 mm), Entire specimen sectioned and mounted in series showing stomodium, external gill in this stage.  EM066A FROG (7 mm), typical c.s.  EM0067 FROG (7 mm), serial sagittal section  EM067A FROG (7 mm), typical sagittal section (not serial) with representative regions.  EM067B Frog, 4 mm. serial sagittal section EM0068 FROG (10 mm), w.m.  EM0069 FROG (10 mm), Internal gill stage. Entire specimen sectioned and mounted in series.  EM069A FROG (10 mm), typical c.s. with representative regions.  EM0070 FROG (10 mm), serial sagittal section of the entire specimen.  EM070A FROG (10 mm), typical sagittal section with representative regions.    top Chick EM0080 CHICK UNINCUBATED, w.m.  EM080A Chick, Embryo, 12 hrs EM0081 CHICK (13-16 HRS), c.s. showing primitive streak  EM0082 CHICK (13-16 HRS), w.m. with primitive steak.  EM0083 CHICK (18 HRS), w.m. showing the formation of the notochord, Hensen's node, primitive streak  EM0084 CHICK (18 HRS), Serial c.s. showing development through the notochord, Hensen's node and primitive streak.  EM0085 CHICK (21 HRS), w.m. showing 1-3 somites, formation of head fold, neural groove  EM0086 CHICK (21 HRS), serial c.s.  EM0087 CHICK (24 HRS), w.m. showing 4-7 somites prominent neural fold and formation of foregut and paired heart primordia  EM0088 CHICK (24 HRS), serial c.s.  EM0089 CHICK (24 HRS), typical c.s.  EM0090 CHICK (24 HRS), serial sagittal section  EM0091 CHICK (24 HRS), typical sagittal section  EM0092 CHICK (28 HRS), w.m. showing 8-10 somites closureof neural groove, differentiation of head region,three primary brain vesicles  EM0093 CHICK (28 HRS), serial c.s.  EM0094 CHICK (33 HRS), w.m. showing 11-14 somites,further differentiation of brain, formation of theheart and of embryonic blood vessels  EM0095 CHICK (33 HRS), serial c.s.  EM0096 CHICK (33 HRS), typical c.s.  EM0097 CHICK (33 HRS), serial sagittal section  EM0098 CHICK (33 HRS), typical sagittal section  EM0099 CHICK (36-40 HRS), w.m. showing 15-18 somites,beginning of flexion and torsion in the headregion, beginning of blood circulation, appearanceof auditory pits.  EM099A Chick, 36 hrs., serial c.s. EM0100 CHICK (43 HRS), w.m. showing 19-23 somites,further flexion and torsion fold of amnion, mandibular aortic arch, optic cup  EM0101 CHICK (48 HRS), w.m. showing 24-28 somites,flexion and torsion progressing further caudally,appearance of tail fold of amnion 2-3 aortic arches, optic cup and lens  EM0102 CHICK (48 HRS), serial c.s.  EM0103 CHICK (48 HRS), typical c.s.  EM0104 CHICK (48 HRS), serial sagittal section  EM0105 CHICK (48 HRS), typical sagittal section  EM0106 CHICK, showing 29-32 somites, beginning of the cervical flexus three visceral clefts and arches  EM106A Chick, 56 hrs. serial c.s. EM106B Chick, 56 hrs. serial sagittal c.s. EM0107 CHICK (60 HRS), w.m.  EM0108 CHICK (72 HRS), w.m.  EM0109 CHICK (72 HRS), serial c.s.  EM0110 CHICK (72 HRS), typical c.s.  EM0111 CHICK (72 HRS), serial sagittal section  EM0112 CHICK (72 HRS), typical sagittal section  EM0113 CHICK (96 HRS), showing 38-41 somites, torsion completed, considerable increase of size and differentiation of the whole embryo.  EM0114 CHICK (96 HRS), erial c.s.  EM0115 CHICK (96 HRS), typical c.s.  EM0116 CHICK (96 HRS), serial sagittal section  EM0117 CHICK (96 HRS), typical sagittal section  top Pig EM125A Pig 7 mm w.m. EM125B Pig 8 mm w.m. EM125C Pig 9 mm w.m. EM0126 PIG (6 MM), serial c.s.  EM0127 PIG (6 MM), typical c.s.  EM127A Pig 8 mm. typical c.s. EM0128 PIG (6 MM), serial sagittal section  EM128A Pig 8 mm. ser. sagittal sect. EM0129 PIG (6 MM), typical sagittal section  EM129A Pig, 8 mm. typical sagittal section EM0130 PIG (10 MM), whole mount  EM0131 PIG (10 MM), serial cross section  EM131A Pig 9 mm .serial c.s. EM131B Pig 8 mm .serial c.s. EM0132 PIG (10 MM), typical cross section  EM0133 PIG (10 MM), serial sagittal section  EM0134 PIG (10 MM), typical sagittal section  EM0135 PIG (10 MM), whole mount of head  EM0136 PIG (15 MM), serial cross section  EM0137 PIG (15 MM), spaced serial cross section  EM0138 PIG (15 MM), typical sagittal section  EM0139 PIG (15 MM), spaced serial sagittal section  EM0140 PIG (20 MM), spaced serial c.s.    top