title: Systems of life No 118. Setting up the systems - 18. The external genitalia.
mesh_terms: D005260:Female; D005836:Genitalia, Female / Q000033:anatomy & histology* / Q000502:physiology; D005837:Genitalia, Male / Q000033:anatomy & histology* / Q000502:physiology; D006801:Humans; D008297:Male