Do the parafollicular (C) cells of the thyroid arise from
neural crest (ectoderm), mesoderm, or endoderm?
After the first breath at birth, what causes closure of the ductus arteriosus?
What is the histologic presentation of DiGeorge's syndrome?
What does the foramen ovale give rise to?
What does the ductus venosus shunt blood away from?
What substance in eosinophilic granules is primarily responsible for defense against helminths and protozoan infections?
What 1 nerve root is associated with the achilles reflex?
What is the primary regulatory control of adrenal medulla secretion?
What specialized vascular structure is found in the lymph node?
What can be found in the cortex of the thymus?
What foetal landmarks (2) have developed within week 3 of fertilization?
What is the function of microglia?
What does CD stand for?