<prompt> Which of the following is derived from ectodermSpleenGall bladderCNSLung epithelium  <response>: Neural crest cells forms peripheral nervous system ENDODERM - gives epithelial lining of respiratory gastro intestinal tracts, biliary system, bladder urethra. MESODERM mesenchyme : i. Paraxial mesenchymesomites somitomeres : Forms sclerotome - veebrae poions of neurocranium axial skeleton. myotome -all voluntary muscles of head, trunk limbs. dermatome - dermis of skin over dorsal regions. ii Intermediate mesenchyme : -forms connective tissue of gonads, mesonephric metanephric nephrons, smooth muscles connective tissues of reproductive tracts. iii Septum transversum : forms epicardium, fibrous pericardium, poion of diaphragm, esophageal mesentery, sinusoids of liver, tissue within lesser omentum falciform ligament. iv Lateral plate mesenchyme : Splanchnopleuric layer : smooth muscles connective tissue of respiratory tracts, intestinal tract, blood vessels associated glands abdominal mesenteries spleen. Somatopleuric layer : appendicular skeleton, connective tissues of limbs trunk including cailage, ligaments tendons. dermis of ventral body wall limbs; mesenchyme of external genitalia Angiogenic mesenchyme Endocardium of hea, endothelium of blood lymphatic vessel vessels of choroid plexus, sinusoids of liver spleen, circulating blood cells, microglia tissue macrophages. 