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anatomy histology embryology foot science pelvis perineum ankle pathology mesenteric ivc vessles coeliac trunk microtomy microtome slide staining skeletal muscle smooth cardiac aorta nail hair skin dermatology sweat glands general anatomy microanatomy lymphatic malt thymus lymph node lymphatics external genitalia urogenital sole calcaneum talus subtalar abdomen radiology endoscopy intestine esophagus stomach abdomen knee hip fibula tibia femur hip bone x-ray changes at birth fetal circulation placenta cvs embryology artery dorsal aortae desmososmes cell membrane gross anatomy pudendal canal pelvic diaphragm spleen