ร่างกาย, การไหลเวียนโลหิต, Aterien, หลอดเลือดดำ, วงจรไฟฟ้า, เลือด, การติดเชื้อในเลือด, สุขภาพ, คุณหมอ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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