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Embryo

QuestionAnswer
Week 1 BLASTOCYST implantation
Week 2 Bilaminar disk (epiblast & hypoblast)
Week 3 Gastrulation, primitive streak + notochord + Neural Plate
Week 3-8 Neural tube, Organogenesis, Teratogen susceptibility
Week 4 Heart beat, limb buds form
Week 10 Genital differentiation
Alar plate Sensory
Basal plate motor
Adenohypophysis origin Surface ectoderm
Neuroectoderm Derivatives CNS
Neural Crest Derivatives ANS, melanocytes, chromaffin & enterochromaffin, Pia & arachnoid, parafollicular C cells, laryngeal cartilage, skull
Endoderm Derivatives Gut tube & projecting organs + Thymus, Parathyroid, Thyroid
Mesoderm Derivatives Dura matter, CT, bone, muscle, heart, lymph, blood, urogenital & kidneys, serous lining, spleen, adrenal cortex
Mesodermal defects VACTERL: Vertebral, Anal atresia, cardiac, T-E Fistula, Renal, Limb (bone, muscle)
Fetal Alcohol Syndrome Inhibition of cell migration -> development retardation, microcephaly, facial abnormalities, limb dislocation, heart & lung fistulas
ACE inhibitors Renal damage
Cocaine Development abnormalities & addiction
Iodide Goiter, hypothyroid
Vitamin A Birth defects
Thalidomide Limb defects “flipper”
Tobacco Preterm, placental probs, ADHD
Warfarin, x-rays, anticonvulsants Multiple anomalies
Right cardinal vein SVC
Left horn of Sinus Venosus Coronary Sinus
Hemoglobin A Spleen from wk 9-28, bone marrow afterwards
Hemoglobin F Liver, week 6-30
Ligamentum teres hepatis (in falciform lig) Umbilical vein
Branchial/Pharyngeal Arch 1 Mandible + Muscles of mastication, inferior jaw (Mylohyoid & ant belly of digastric. Inner Ear: Malleus, incus + tensor tympani/veli palatini. Anterior tongue. CN V2, 3
Branchial/Pharyngeal Arch 2 STAPES, styloid, anterior hyoid, stylohyoid ligament & muscle, posterior digastric, Facial expression muscles. CN 7
Branchial/Pharyngeal Arch 3 Greater Hyoid, stylopharyngeus. CN 9, posterior tongue (w/#4)
Branchial/Pharyngeal Arch 4 Pharyngeal constrictors, levator veli palatini, posterior tongue (w/#3). Superior laryngeal CN 10. w/6: Cartilage of the throat: corniculate, cuneiform, arytenoids, cricoid, thyroid.
Branchial/Pharyngeal arch 6 Intrinsic laryngeal muscles (minus cricothyroid). Recurrent laryngeal CN 10. w/4: Cartilage of the throat: corniculate, cuneiform, arytenoids, cricoid, thyroid.
1st Branchial/Pharyngeal cleft & pouch 1st Cleft: External auditory meatus. 1st Pouch: Middle ear, eustachian tube
2nd Branchial/Pharyngeal Pouch Palatine tonsils
3rd Branchial/Pharyngeal Pouch Dorsal: Inferior Parathyroid. Ventral: Thymus
4th Branchial/Pharyngeal Pouch Superior parathyroid
Tongue Innervation Ant 2/3- Taste CN 7, Sensory CN V3. Posterior 1/3: Taste & sensation CN9,10. Motor CN 12
Urogenital Sinus Derivatives Male: Corpus spongiosum, bulbourethral/Cowper’s glands, prostate glands. Female: Vestibular bulbs, Bartholin glands, Urethral & paraurethral glands (of skene)
Urogenital Fold Derivatives M: Ventral shaft of penis. F: Labia Minora
Genital Tubercle Glans penis, clitoris
Created by: Kyle Tiemeier
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