Structures Talaga

STRUCTURES Area opaca o Area opaca vasculosa o Area opaca vitellina Area pellucida Proamnion Subcephalic pocket Amniotic fold Yolk sac Amnion chorion allantois Fetal membrane Pleuro-pericardial membrane Transverse septum Lateral amniotic fold Allantoic rudiment Chorio-allantoic membrane Lateral body fold Cloacal membrane Mediastinum Dorsal mesogaster Ventral mesogaster Hepatogastric ligament Hepatoduodenal ligament Mesoduodenum Neural folds Neural groove

24 HR

33 HR

48 HR

X

X



X X

X x

 

X

x



x x

x

     

x



x x

x

72 HR I. MEMBRANES

X x x

x



x



x

 x



x X x X

   

x



x



x



x II. BRAIN REGION X X

Other notes

  

FATE

3 zones: margin of growth, zone junction, germ wall

connected with pleuropericardial membrane

Anal opening

Neural tube

x



x

Neural crest

x

x

Head fold Notochord Anterior border of the mesoderm Thickened splanchnic mesoderm Unsegmented mesoderm Mesenchyme of the head Somite 1st somite - dermatome - myotome - sclerotome Head ectoderm Anterior neuropore Prechordal plate Prosencephalon Optic vesicle Infundibulum Prosocoel Mesencephalon

X X

x



x

x

 

X



X

 

X

x

X

x

x

x



X

x

x

x

 

x



X X

x



x x X x x

     

x

x

x

X

X

Aqueduct of sylvuis



mesocoel Diencephalon

x

x

X



Telencephalon

X

x

X



Lamina terminalis Rhombencephalon Metencephalon myelencephalon

Ganglia, pigment cells, part of gill arches

x x x x

X X

X X

   

Cerebral hemisphere section of telencephalic wall cerebellum medulla

Posterior choid plexus Spinal cord Central canal Roof plate Floor plate Basal plate Alar plate Sulcus limitans Marginal layer Ependymal layer Mantle layer Sinus rhomboidalis Velum transversum Lens placode Auditory pit Auditory vesicle isthmus

x

x

X



x x x x x x x x x x

          

x x



x

   

x x x x X 3 branches: -maxillary -mandibular -ophthalmic

Semilunar ganglion

x

Jugular ganglion

x

x

Acoustic-facialis ganglion

x

x

Superior ganglion

x

x

Oculomotor nerve Optic cup Presumptive retina Presumptive pigmented epithelium Sensory retina

Roof of the medulla

x

Inner ear

 

trigeminal V cranial nerve syn gasserian ganglion



ganglion of the X cranial nerve ganglia of VII and VII cranial nerve ganglion of glossopharyngeal IX nerve

 

X



x



III cranial nerve

4th extrinsic eye muscle

x



Sensory retina

X



Pigmented epithelium



Thick inner layer of the



optic cip Thin, outer layer of the optic cup

x



Covers the eye lens

  

Syn: choroid fissure

Pigmented retina Corneal epithelium Optic stalk Optic fissure Lens vesicle

x x

x X x

Rathke’s pouch

x

x



Otic vesicle Nasal placode Nasal pit Neuromere Endolymphatic duct

x x

x X x

   

x



Sclera & choroid

lens Hypophysis/ anterior pituitary gland

External nares

 III. DIGESTIVE SYSTEM Foregut Anterior Intestinal Portal Posterior intestinal Portal

X

x

X

x

Oral plate

x

Pre-oral gut Subgerminal cavity Midgut Pharynx Stomodeum Maxillary process Mandibular process Pre-oral gut Mandibular arch Maxillary arch Symphysis of the lower jaw

x

 X

x



x

x



x

x x

  

x x x x

x x x

x x

syn: pharyngeal membrane midgut

   

x



x x x

x x

  

x



jaws

Future esophagus Esophagus Stomach Cranial liver diverticulum Caudal liver diverticulum duodenum Hindgut cloaca Amnio-cardiac vesicle heart Bulbus cordis Epimyocardium Dorsal mesocardium Ventricle atrium Sinus venosus

x x

  

X

X



x

x



X x

x x

x x x IV. HEART REGION

esophagus

   

x x x x

x

x

x

x

x

x x

x x x

x x x

Trabeculae

x

Pericardial cavity

x

        

heart

isthmus mesodermal stalk Future auricle continuation of atrium irregular projection of the myocardium

 

V. EXCRETORY Nephrotome Paired mesonephric duct Mesonephric tubules Mesonephric ridge

x



x x

nephrostome



x



x

 

x

Pronephros Sinus terminalis Blood islands Anterior cardinal vein

x

x VI. BLOOD VESSELS

 

x x x



x

x



Mesonephric kidney opening of mesonephric tubule

Cardinal vein -common cardinal vein - postcardinal vein Dorsal aorta (paired) Descending aorta Ventral aorta Ventral aortae 1st aortic arch 2nd aortic arch 3rd aortic arch 4th aortic arch vitelline blood vessels -vitelline artery -vitelline vein

x x x X X x

x

x

 

x

x



x x

x x

x x x

x x x x

       

x

 Vitelline veins

x

Vitelline artery Omphalomesenter ic vein Carotid loop Internal carotid arteries Dorsal intergemented arteries Ductus venosus Allantoic vein Subcardinal vein

dorsal – postcardinal vein ventral – common cardinal vein

x

x

x

x



syn. Omphalomesenteric vein posterior extensions of the sinus venosus

 

x



x x

x



x

x



X x x

  

posterior of sinus venosus

 Primitive streak Primitive groove Primitive ridges Primitive pit

X X X X

VII. OTHER STRUCTURES (pouch, groove, branchial arch=pharyngeal arch) X    

Hensen’s node Somatopleure Splanchnopleure Coelom Hypomere Thyroid gland Thyroid rudiment 1st branchial groove 2nd branchial groove 3rd branchial groove 1st pharyngeal pouch 2nd pharyngeal pouch 3rd pharyngeal pouch 1st visceral arch

X x x x x

     

x

x x x

x



X



X



x



X



X



x



X

X



visceral arch

X

X



3 visceral arch Extraembryonic coelom Laryngotracheal groove trachea

x

x



x

x



x

x



Lung bud

x

2

nd rd

responsible for metabolism and growth

Larynx, tachea, lung bud

 x



Wing bud

x



Leg buds

x



Pleural cavity

X

x



Peritoneal cavity Pleuropericardial cavity Tail bud

x

x



x



x



Paired wing

x



Closing plate

x



x

syn: lateral mesocardium

Pharyngeal furrow 1st pharyngeal furrow and pouch 2nd pharyngeal furrow and pouch 3rd pharyngeal furrow and pouch Hyoid arch

x



X



X



x



x

