Term
| Three Regions of Ectoderm |
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Definition
prospective neural tube
prospective neural crest
prospective epidermis |
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Term
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Definition
Brain
Spinal cord
Motor nerves
Optic vesicles
Posterior pituitary |
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Term
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Definition
Prosencephalon
Rhombencephalon
Mesencephalon |
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Term
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Definition
telencephalon
diencephalon |
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Term
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Definition
cerebral hemispheres
olfactory centers |
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Term
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Definition
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Term
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Definition
"antechanber of cerebellum"
sensory fibers from spinal cord and brain pass through to the cerebrum |
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Term
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Definition
hunger center and thirst center
infundibulum |
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Term
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Definition
hypothal. deriv.
post. pituitary
optic vesicles (give rise to optic cups) |
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Term
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Definition
midbrain
optic tecta- visual interpretation center |
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Term
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Definition
metencephalon (cerebellum)
myencephalon (medulla) |
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Term
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Definition
migratory cells found at closure of neural tube
FORM:
Cartilages in voic ebox and throat
Adrenal medulla
Pigment cells (except retinal)
Sensory nerves and ganglia
Autonomic ganglia |
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Term
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Definition
surface ectoderm
Two types:
Placodes and Remaining (everything else) |
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Term
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Definition
localized thickenings of ectoderm forming plate-like structures
Include:
Some head nerves
Olfactory structures
Lens of eyes
Inner ear
Taste buds |
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Term
| Remainder of epidermal derivatives |
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Definition
Lining of mouth and anus
Outer layer of skin
Horns
Hair
Anterior pituitary (Rathke's Pocket)
Nails |
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Term
| pituitary gland dual origin |
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Definition
| neuronal component (infundibulum) and a glandular component |
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Term
| Mesoderm three major regions |
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Definition
Epimere
Mesomere
Hypomere |
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Term
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Definition
dorsal mesoderm that forms somites
called metamerism |
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Term
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Definition
aka Intermediate Cell Mass
Forms gonads and renal structures (kidneys) |
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Term
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Definition
aka Lateral Plate Mesoderm
Forms heart and lining of coelum |
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Term
| Somites divided into 3 regions |
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Definition
Dermatome
Myotome
Scleretome |
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Term
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Definition
outer region of somite parallel to the epidermis
forms dermis |
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Term
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Definition
dorsal region of inner somite wall
skeletal muscle of:
tongue
eye
neck
intercostal area (between ribs) |
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Term
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Definition
ventomesial portion of somite
loses precise boundaries and extends towards notochord
undergoes chondrification (change tissue into cartilage) under inductive influence of spinal cord and/or notochord and forms vertebral column (costal processes/ribs) |
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Term
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Definition
aka ICM
between epimere and hypomere
Forms gonads
Forms vertebrate kidney |
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Term
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Definition
pronephros
mesonephros
metanephros
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Term
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Definition
| first to form and most anterior |
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Term
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Definition
posterior to pronephros and forms after it
adult kidney in amphibians
embryonic kidney in birds/mammals
mesonephric duct= Wolffian duct |
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Term
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Definition
last to form and posterior to mesonephros
adult kidney in birds/mammals |
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Term
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Definition
ventrolateral to epimere
unsegmented sheet
Two layers:
somatic
sphlanchnic
coelum (body cavity) forms between the layers |
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Term
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Definition
originally continuous, later divided
1.Pleural Cavity (surrounds lungs)
2.Pericardial Cavity (suur. heart)
3.Peritoneal Cavity (surr. viscera-abdominal organs)
All 3 cavities lined with hypomere
derived epithelium:
Pleura, Pericardium, Peritoneum |
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Term
| Hypomere: Sphlanchnic Layer (Visceral) |
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Definition
adjacent to endoderm
can join w/endo. to form tissue called sphlanchnopleure
FORMS:
inner portion of peritoneum
smooth muscle of digestive system
heart and blood vessels
embryonic blood vessels |
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Term
| Hypomere: Somatic Layer (Parietal) |
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Definition
adj. to ectoderm
may join w/ ecto. to form somatopleure
FORMS:
1. Lateral and ventral parts of dermis (w/ somites)
2. Outer portion of peritoneum (lining of abdom. cavity)
3. Limb buds |
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Term
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Definition
surrounds the gut
3 Regions of gut
Foregut
Midgut
Hindgut |
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Term
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Definition
anterior region is pharynx
DERIVATIVES:
duodenum
esophagus
liver
lung bud
pharyngeal pouches
stomach
thyroid
trachea |
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Term
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Definition
DERIVATIVES:
jejunum
ileum
portion of large intestine |
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Term
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Definition
DERIVATIVES:
urinary bladder
urethra
rectum
cloaca (in all vert. but mammals serves as chamber for waste of urin. and digest. sys and prod of reprod. sys) |
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Term
| Areas where Ectoderm and Endoderm are in direct contact |
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Definition
1. mouth
2. anus
3. branchial membranes (which rupture in aquatic vert. to form clefts involved in resp. organ formation) |
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Term
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Definition
form from lateral walls of pharynx
form sequentially in an anteroposterior direction beg. just behind mouth
envag. pouches that fuse with invag. ectod. furrows to form branchial membranes |
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Definition
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