part_of part of part of develops from has developmental contribution from larynx pharyngeal arch pharyngeal arch 4 pharyngeal arch 6 dense mesenchyme tissue splanchnocranium laryngeal associated mesenchyme Many sources say: thyroid cartilage from arch 4 other laryngeal cartilage (cricoid/arytenoid) from 6? EHDAA2:0004085 UBERON:0010221