gigantocellular part of magnocellular preoptic nucleus
gill filament +
gill lamella +
gill opening
gland of nasal mucosa +
gonad primordium +
granular layer corpus cerebelli
granular layer valvula cerebelli
gustatory pore
hair root sheath +
hair root sheath matrix
Hatschek's diverticulum +
head kidney +
head of pancreas +
heart primordium +
hepatic acinus +
hepatic cord +
heterogeneous tissue +
hip joint primordium +
horn of thyroid cartilage +
hyoid bone lesser horn
hypochord
hypopharynx +
hypothalamo-hypophyseal system
hypothalamus-pituitary axis
inferior parathyroid gland +
infundibulum of gallbladder
inner fin tissue
insect abdominal histoblast primordium +
insect adult clypeo-labral primordium +
insect Bolwig organ primordium +
insect circulatory system primordium +
insect clypeo-labral primordium +
insect dorsal epidermis primordium +
insect embryonic optic lobe primordium
insect imaginal disc primordium +
insect tracheal primordium +
insect ventral epidermis primordium +
insect visual primordium +
interalveolar septum
intermediate cell mass of mesoderm
internal cellular layer
interparietal bone primordium +
interrenal primordium +
interstitial fluid +
intervillus pockets +
islet of Langerhans
isthmus of thyroid gland
knee joint primordium +
lamina +
lamina propria of bronchus
laryngeal apparatus +
laryngeal associated mesenchyme +
laryngeal cartilage +
laryngeal pre-cartilage condensation +
laryngeal prominence
laryngeal ventricle
laryngeal vocal fold +
laryngotracheal groove
larynx connective tissue +
larynx mucous gland
larynx submucosa +
larynx submucosa gland
late distal segment
lateral line +
lateral line primordium +
lateral process of cricoid cartilage
lateral wall of nasopharynx
lateral wall of oropharynx
left lung alveolar system +
lens cortex
lens vesicle +
ligament of larynx +
ligament of liver +
limiting layer of elasmoid scale
lingula of left lung
liver +
liver lobule +
liver papillary process
liver parenchyma +
liver primordium +
liver reticuloendothelial system
liver stroma +
liver subserosa
liver trabecula
lobar bronchus alveolar system
lobe of liver +
lobe of lung +
lower oral valve
lower respiratory tract cartilage +
lower respiratory tract connective tissue +
lung +
lung field
lung parenchyma +
lung primordium +
lung saccule
macula +
matrix-based tissue
membrana tympaniformis +
mesenchyme +
mesenchyme of main bronchus +
mesenchyme of trachea +
metabolic zone of liver +
mineralized extracellular matrix +
mixed endoderm/mesoderm-derived structure +
mole
molecular layer corpus cerebelli +
molecular layer valvula cerebelli +
mossy fiber
mucosa of biliary tree +
mucosa of gallbladder +
mucosa of larynx +
mucosa of nasopharynx
mucosa of oropharynx
mucous gland of lung
muscle of larynx +
muscle tissue +
musculature of larynx +
nail matrix
nasal cavity mucosa +
nasal-associated lymphoid tissue +
nasopharyngeal gland
nasopharynx +
nasopharynx connective tissue
neck of gallbladder
nephron progenitor +
neural tissue
neurogenic field +
non-neural ectoderm +
notochord posterior region
optic vesicle +
oronasal membrane
oropharyngeal gland
oropharynx +
outer fin tissue
palatine tonsil
pancreas dorsal primordium +
pancreas head parenchyma
pancreas primordium +
pancreas tail parenchyma
pancreas ventral primordium +
pancreatic acinus
pancreatic duct +
pancreatic lobule +
pancreatic system
parallel fiber
parenchyma of thyroid gland
parotid gland primordium +
pars acromialis
pars amphibiorum
pars basilaris
pars glenoidalis of scapula
pearly penile papule
penile spine
periodontium +
periurethral tissue +
pharyngeal arch derived gill +
pharyngeal bar
pharyngeal epithelium +
pharyngeal gill precursor +
pharyngeal gland +
pharyngeal mesoderm
pharyngeal mucosa +
pharyngeal opening of pharyngotympanic tube
pharyngeal raphe
pharyngeal slit
pharyngeal tubercle
pharyngeal vasculature +
pharyngobasilar fascia
pillar of the semicircular canal +
placodal ectoderm
pleural sac +
portal lobule
portal triad +
post-anal gut
posterior wall of nasopharynx
posterior wall of oropharynx
primary olfactory fiber layer
primordial vasculature +
prominentia apicalis dorsalis
prominentia apicalis ventralis
proximo-distal subdivision of respiratory tract +
pulmonary collagen fibril
pulmonary lobule +
pulmonary lymphatic vessel
pulmonary neuroendocrine body
pulmonary part of lymphatic system +
Purkinje cell layer corpus cerebelli
Purkinje cell layer valvula cerebelli
ramule palatonasalis
ramus muscularis of glossopharyngeus nerve
ramus muscularis of vagus nerve
Reichert's cartilage +
renin-angiotensin system
respiratory primordium +
respiratory tract +
respiratory tube +
retromolar triangle
rhombic lip +
right lung alveolar system +
roof of nasopharynx
root of nail
rostral blood island
saccus dorsalis
salivary gland primordium +
scale primordium
septal organ of Masera
skeletal muscle tissue of pharynx
sphincter of hepatopancreatic ampulla
spiral valve of cystic duct
spleen primordium +
squamous part of temporal bone primordium +
stapes base
stapes bone +
stomach primordium
stratum fibrosum et griseum superficiale
stratum marginale
stratum opticum
stratum periventriculare
stroma of thyroid gland
stylohyoid ligament
styloid process of temporal bone +
submucosa of biliary tree +
submucosa of bronchus +
submucosa of pharynx +
submucosa of trachea +
superficial fascia
syrinx organ +
tail of pancreas +
taste bud +
temporomandibular joint primordium +
tetrapod frontal bone primordium
tetrapod parietal bone primordium
thymus primordium +
thymus primordium endoderm
thymus subunit +
thyroglossal duct
thyroid diverticulum +
thyroid follicle +
thyroid gland +
thyroid gland medulla
thyroid primordium +
The initial thyroid precursor, the thyroid primordium, starts as a simple midline thickening and develops to form the thyroid diverticulum. This structure is initially hollow, although it later solidifies and becomes bilobed. The 2 lobes are located on either side of the midline and are connected via an isthmus.