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Contents 1 the animal cell (Gray's s2) 1.1 Gray's page #35 1.2 Gray's page #36 1.3 Gray's page #37 1.4 Gray's page #38 2 the ovum (Gray's s3) 2.1 Gray's page #38 2.2 Gray's page #39 2.3 Gray's page #40 2.4 Gray's page #41 2.5 Gray's page #42 3 the spermatozoön (Gray's s4) 3.1 Gray's page #42 3.2 Gray's page #43 4 fertilization of the ovum (Gray's s5) 4.1 Gray's page #44 4.2 Gray's page #45 5 segmentation of the fertilized ovum (Gray's s6) 5.1 Gray's page #45 5.2 Gray's page #46 5.3 Gray's page #47 5.4 Primitive streak 5.4.1 Gray's page #47 5.5 Ectoderm 5.5.1 Gray's page #48 5.6 Entoderm 5.6.1 Gray's page #49 5.7 Mesoderm 5.7.1 Gray's page #49 5.7.2 Gray's page #50 6 the neural groove and tube (Gray's s7) 6.1 Gray's page #50 6.2 Gray's page #51 6.3 Gray's page #52 7 the notochord (Gray's s8) 7.1 Gray's page #52 8 the primitive segments (Gray's s9) 8.1 Gray's page #52 9 separation of the embryo (Gray's s10) 9.1 Gray's page #53 9.2 Gray's page #54 10 the yolk-sac (Gray's s11) 10.1 Gray's page #54 11 development of the fetal membranes and placenta (Gray's s12) 11.1 Gray's page #54 11.2 Gray's page #56 11.3 Gray's page #57 11.4 Gray's page #58 11.5 Gray's page #59 11.6 Gray's page #60 11.7 Gray's page #61 11.8 Gray's page #62 11.9 Gray's page #63 11.10 Gray's page #64 11.11 Gray's page #65 12 the branchial region (Gray's s13) 12.1 Gray's page #65 12.2 Gray's page #66 12.3 Gray's page #67 12.4 Gray's page #68 12.5 Gray's page #69 12.6 Gray's page #70 12.7 Gray's page #71 13 development of the body cavities (Gray's s14) 13.1 Gray's page #72 14 the form of the embryo at different stages of its growth (Gray's s15) 14.1 Gray's page #74 15 See also

[edit] the animal cell (Gray's s2)

[edit] Gray's page #35

• Embryology
• ontogeny
• phylogeny
• ovum
• spermatozoön
• segmentation
• differentiation
• somatic cells
• germinal cells
• Animal cell
• fertilized ovum
• cytoplasm
• nucleus
• nucleolus
• Cytoplasm (protoplasm)

[edit] Gray's page #36

• mitochondria
• paraplasm
• spongioplasm
• hyaloplasm
• cell membrane
• Nucleus
• nuclear membrane
• nuclear substance (nuclear matrix)
• karyoplasm
• karyomitome
• linin
• chromatin (basichromatin)

[edit] Gray's page #37

• nucleoli
• pseudo-nucleoli
• true nucleoli
• centrosome
• centriole
• centrosphere
• attraction sphere
• direct division
• Indirect division or karyokinesis (karyomitosis)
• resting stage
• Prophase
• chromosomes
• achromatic spindle
• mother star or monaster
• Metaphase
• daughter chromosomes
• Anaphase
• diaster
• Skein, or spirem

[edit] Gray's page #38

• Telophase

[edit] the ovum (Gray's s3)

[edit] Gray's page #38

• oögonia
• ova or primary oöcytes

[edit] Gray's page #39

• yolk or oöplasm
• germinal vesicle
• germinal spot
• zona striata or zona pellucida
• corona radiata
• Yolk
• cytoplasm
• formative yolk
• nutritive yolk or deutoplasm

[edit] Gray's page #40

• centrosome
• centriole
• Germinal vesicle
• zona striata or zona pellucida
• corona radiata
• polar bodies or polocytes
• mature ovum

[edit] Gray's page #41

• secondary oöcyte
• first polar body
• mature ovum
• second polar body

[edit] Gray's page #42

• female pronucleus

[edit] the spermatozoön (Gray's s4)

[edit] Gray's page #42

• spermatozoa or male germ cells
• head
• head-cap
• perforator

[edit] Gray's page #43

• neck
• anterior centriole
• connecting piece or body
• terminal disk
• axial filament
• spiral thread
• mitochondria sheath
• tail
• end-piece
• spermatogonia
• primary spermatocytes
• secondary spermatocytes
• spermatids

[edit] fertilization of the ovum (Gray's s5)

[edit] Gray's page #44

• tubal pregnancy
• abdominal pregnancy
• ovarian pregnancy

[edit] Gray's page #45

• cone of attraction
• vitelline membrane
• male pronucleus
• segmentation nucleus

[edit] segmentation of the fertilized ovum (Gray's s6)

[edit] Gray's page #45

• holoblastic
• meroblastic

[edit] Gray's page #46

• morula
• trophoblast
• inner cell-mass
• blastodermic vesicle
• embryonic pole

[edit] Gray's page #47

• syncytium or syncytiotrophoblast
• cytotrophoblast or layer of Langhans
• amniotic cavity
• embryonic disk
• embryonic ectoderm

[edit] Primitive streak

[edit] Gray's page #47

• primitive streak
• Hensen's knot
• primitive groove
• blastophore
• buccopharyngeal membrane
• pericardial area
• proamniotic area
• proamnion
• cloacal membrane

[edit] Ectoderm

[edit] Gray's page #48

• Ectoderm

[edit] Entoderm

[edit] Gray's page #49

• Entoderm

[edit] Mesoderm

[edit] Gray's page #49

• Mesoderm

[edit] Gray's page #50

• paraxial mesoderm
• lateral mesoderm
• intermediate cell-mass
• lateral mesoderm
  • somatic layer
    • somatopleure
  • splanchnic layer
    • splanchnopleure
• celom

[edit] the neural groove and tube (Gray's s7)

[edit] Gray's page #50

• neural folds
• neural groove
• neural tube or neural canal
• neurenteric canal

[edit] Gray's page #51

• sinus rhomboidalis
• neural crest or ganglion ridge
• fore-brain (prosencephalon)
• mid-brain (mesencephalon)
• hind-brain (rhombencephalon)

[edit] Gray's page #52

• medulla spinalis or spinal cord

[edit] the notochord (Gray's s8)

[edit] Gray's page #52

• chordal furrow
• notochord

[edit] the primitive segments (Gray's s9)

[edit] Gray's page #52

• primitive segments
• myocœl
• intermediate cell-mass

[edit] separation of the embryo (Gray's s10)

[edit] Gray's page #53

• Cephalic fold of embryo
• Caudal fold of embryo
• fore-gut
• body-stalk
• hind-gut

[edit] Gray's page #54

• umbilical vesicle
• vitelline duct

[edit] the yolk-sac (Gray's s11)

[edit] Gray's page #54

• vitelline fluid
• vitelline circulation
• vitelline duct
• Meckel's diverticulum

[edit] development of the fetal membranes and placenta (Gray's s12)

[edit] Gray's page #54

• Allantois

[edit] Gray's page #56

• Allantois
  • body-stalk

• Amnion
  • amniotic ectoderm
  • amniotic fold
  • amniotic cavity
  • amnion
  • false amnion or serosa

[edit] Gray's page #57

• Umbilical cord and Body-stalk

[edit] Gray's page #58

• Umbilical cord and Body-stalk
  • jelly of Wharton

[edit] Gray's page #59

• Implantation or Imbedding of the Ovum
  • intervillous space

• Decidua
  • decidual cells
  • stratum compactum

[edit] Gray's page #60

• Decidua
  • stratum spongiosum
  • unaltered or boundary layer
  • decidua capsularis
  • decidua basalis or decidua placentalis
  • decidua vera or decidua parietalis

• Chorion
  • cytotrophoblast or layer of Langhans
  • syncytiotrophoblast
  • chorionic villi

[edit] Gray's page #61

• Chorion
  • chorion læve

[edit] Gray's page #62

• Chorion
  • chorion frondosum

• Placenta
• Fetal portion

[edit] Gray's page #63

• Maternal portion
  • basal plate
  • cotyledons

[edit] Gray's page #64

• Separation of the Placenta
  • after-birth
  • cotyledons

[edit] Gray's page #65

• Separation of the Placenta
  • velamentous insertion

[edit] the branchial region (Gray's s13)

[edit] Gray's page #65

• Branchial arches or Visceral arches and Pharyngeal pouches
  • branchial or outer pharyngeal grooves
  • closing membranes

[edit] Gray's page #66

• Branchial arches or Visceral arches and Pharyngeal pouches
  • gill-clefts
  • branchial arches or visceral arches
• mandibular arch (first branchial arch)
  • Meckel's cartilages
  • maxillary process
  • second branchial arch or hyoid arch

[edit] Gray's page #67

• mandibular arch (first branchial arch)
  • third branchial arch
  • fourth branchial arch
  • fifth branchial arch
  • sixth branchial arch
  • sinus cervicalis
• sinus tonsillaris
• Nose and Face
  • olfactory areas
  • fronto-nasal process

[edit] Gray's page #68

• Nose and Face
  • olfactory pits
  • medial nasal process
  • lateral nasal process
  • globular processes of His
  • nasal laminae

[edit] Gray's page #69

• Nose and Face
  • columella
• maxillary process
  • naso-optic furrow

[edit] Gray's page #70

• maxillary process
  • primitive palate
  • bucco-nasal membrane
  • primitive choanae
  • palatine processes
  • permanent choanae

[edit] Gray's page #71

• maxillary process
  • vomero-nasal organs of Jacobson
• Limbs

[edit] development of the body cavities (Gray's s14)

[edit] Gray's page #72

• septum transversum

[edit] the form of the embryo at different stages of its growth (Gray's s15)

[edit] Gray's page #74

• Embryo, form of, at different stages:

[edit] See also

• List of images and subjects in Gray's Anatomy
• List of images in Gray's Anatomy: I. Embryology
• Gray's Anatomy

v • d • e Developmental biology > Human embryogenesis (development of embryo) and development of fetus First three weeks Week 1 Fertilization · Egg activation · Zygote · Cleavage · Morula · Blastula (Blastomere) · Blastocyst · Inner cell mass Week 2 (Bilaminar) Hypoblast · Epiblast Week 3 (Trilaminar) Germ layers Archenteron/Primitive streak (Primitive pit, Primitive knot/Blastopore, Primitive groove) · Gastrula/Gastrulation · Regional specification Ectoderm Surface ectoderm · Neuroectoderm · Somatopleure · Neurulation · Neural crest Endoderm Splanchnopleure Mesoderm Chorda- · Paraxial (Somite/Somitomere/Sclerotome/Myotome/Dermatome) · Intermediate · Lateral plate (Intraembryonic coelom, Splanchnopleure/Somatopleure) Extraembryonic/ uterus Trophoblast (Cytotrophoblast, Syncytiotrophoblast) Blastocoele · Yolk sack/exocoelomic cavity · Heuser's membrane · Extraembryonic coelom · Vitelline duct Umbilical cord (Umbilical artery, Umbilical vein, Wharton's jelly) · Allantois Placenta · Decidua (Decidual cells) · Chorionic villi/Intervillous space · Gestational sac (Amnion/Amniotic sac/Amniotic cavity, Chorion) Histogenesis Programmed cell death (Apoptosis) · Stem cells · Germ line development Organogenesis Limb development: Limb bud · Apical ectodermal ridge/AER other structures: Eye development · Cutaneous structure development · Heart development · Development of the urinary and reproductive organs (Some dates are approximate—see Carnegie stages and a timeline.)

v • d • e Human development of head and neck / branchial apparatus (GA 1.65) Nose Nasal placode · Olfactory pit · nasal prominences (Lateral, Medial) · Intermaxillary segment Mouth/neck Palate Primitive palate · Secondary palate 1st arch Frontonasal prominence · Maxillary prominence · Mandibular prominence (Meckel's cartilage) Anterior tongue: Lateral lingual swelling · Tuberculum impar Thyroid (pouches 3-5) Thyroid diverticulum · Thyroglossal duct · Ultimobranchial body General Pharyngeal groove (Cervical sinus) · Pharyngeal arch (1st, 2nd) · Pharyngeal pouch (Ultimobranchial body) respiratory system navs: anat nose,larynx/lower+thoracic cavity/physio/dev, noncongen/congen/tumors, symptoms+signs/eponymous, proc mouth navs: anat/dev, noncongen/congen face/congen GI/neoplasia, symptoms, proc endocrine navs: anat/physio/dev/hormones, noncongen/congen/neoplasia, symptoms+signs/eponymous, proc