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Spinal Anatomy
Embryology
| Question | Answer |
|---|---|
| subgroups of mesoderm | Paraxial, Intermediate, Head, Lateral Plate |
| Paraxial - somatic | skeletal muscles, ligaments, tendons |
| 31 somites | mesodermal paraxial |
| Paraxial - splanchnic | smooth muscle of organs |
| Intermediate | urogenital system, kidneys |
| head | skull, muscles, dentine, CT |
| lateral plate | adrenal cortex, blood and lymphs, cardiovascular and lymphs |
| Ectoderm subgroups | surface ectoderm, neuroectoderm (neural tube, neural crest) |
| surface ectoderm | epidermis, skin, lens of eye, cornea, hair, nails, ant. pituitary, enamel |
| neuroectoderm - neural tube | post. pituitary, retina, CNS, pineal body, oligodendrocytes |
| neuroectoderm - neural crest | DRG, ANS, parafollicular cells of thyroid, adrenal medulla, sympathetic chain ganglion, PNS, Schwann cells |
| intramembranous ossification | clavicle and all float bones of skull |
| enchondral ossification | ossification of all other bones |
| intramembranous and enchondral ossification | scapula |
| stomodeum | mouth |
| back of throat to 1st 1/3 of duodenum | foregut |
| 2nd 2/3 duodenum to 1st 2/3 transverse colon | midgut |
| last 1/3 transverse colon to anus | hindgut |