x-rays can pass through some parts of the body
lymph_node is body_part. human_heart is body_part. x_ray is picture_of_bones. spinal_cord is body_part. leaving is passing_through. x_raying is medical_imaging. lymph_node is internal_body_part. x_raying is diagnostic_medical_procedure. upper_respiratory_tract is body_part. traversing_tunnel is passing_through.