Phase B Lineages

PNS: CNs III-XII, spinal nerves, ganglia (cranial: V, VII, IX, X; spinal: dorsal root; autonomic: sympathetic and parasympathetic), schwann cells, sensory and motor nerve endings NEWLINE melanocytes, chromaffin cells, enterochromaffin cells, adrenal medulla, parafollicular C-cells in thyroid, heart (valves, cardiac skeleton, pulmonary trunk, chorda tendinae, ascending aorta, cushions, membranous atrial and ventricular septae), corneal endothelium

CNS: Brain, spinal cord, neuroglia, ependyma, CNs I and II, posterior pituitary, pituicytes, hypothalamus, thalamus, pineal gland

epidermis; hair; nails; glands' anterior pituitary; gonadotropic, somatotropic, folliculostellate, precursor, thyrotropic, corticotropic, and mammotropic cells; lens; cornea; enamel

Cervical, Thoracic, Lumbar, & Sacral mesenchyme forms bone, cartilage, CT, BVs, LVs of axial and appendicular skeletons, leptomeninges (pia and arachnoid) covering the spinal cord

Cervical, Thoracic, Lumbar, & Sacral mesenchyme forms skeletal muscle, BVs, LVs of axial and appendicular skeletons

Cervical, Thoracic, Lumbar, & Sacral mesenchyme forms dermis, connective tissue, BVs, LVs of axial and appendicular skeletons

bone, cartilage, dermis, CT, skeletal muscle, BVs, LVs of trunk

Stroma: smooth muscle, fat, connective tissue, fibroblasts, BVs. LBs for respiratory, lower 1/3 of esophagus, stomach, small intestine, appendix, large intestine, colon, rectum, liver, gall bladder, pancreas, urinary bladder NEWLINE Heart: endocardium, myocardium, pericardium, epicardium, endothelium NEWLINE intra-embryonic blood formation of RBCs & WBCs begins @ week 5 NEWLINE Spleen: parenchyma: red pulp, whilte pulp; stroma: capsule, trabeculae NEWLINE Adrenal Cortex: parenchyma: z. fasciculata, z. glomerulosa, z. reticularis; stroma: capsules and BVs

Kidney dev. from uteric bud and IM; collection tubes, calices, renal pelvis, and ureter development from uteric bud; UB endoderm

Gonads (with LP Splanchic Mesoderm - mesothelium and germ cells - sperm and ova) NEWLINE indifferent gonad = LP splanchnic mesoderm + IM with cortex and medulla NEWLINE XY embryo: medulla develops into testes, cortex regresses NEWLINE XX embryo: cortex develops into ovary, medulla regresses

Parenchyma: thyroid gland; respiratory system; GI system; NEWLINE lining of pharyngeal pouches: I - middle ear; II - pharyngeal tonsils, III- thymus and inferior parathyroids, IV - superior parathyroids; NEWLINE ultimo-branchial bodies, parafollicular C-cells of thyroid

Hofbauer cells