The term descending aorta is identified in base64 scheme by the sequence ZGVzY2VuZGluZyBhb3J0YQ==, while the MD5 signature is equal to 784378b56c2e9a566244159bdeffd688. The ASCII encoding of descending aorta in hexadecimal notation is 64657363656e64696e6720616f727461.