外皮系统

大肠杆菌对赤子爱胜蚓体表超微结构的影响

integumentary system

integumentary

integumentary【昆】;parietal【解剖】

integumentary tapetum

integumentary glands

integumentary musculature【脊椎】

integumentary system【解剖】

integument ( integumentary system )