Hospital signs

• BP, pulse, etc
• Essential parts
• Blood pressure, heart rate, etc
• Blood pressure, body temperature, etc.
• Blood pressure, body temperature, etc
• They're checked by EMTs
• Emergency room stats

Wiktionary Word definitions in Wiktionary
n. 1 (context plurale tantum English) Those organs of the body that are essential for life. 2 (context plurale tantum figuratively English) Those parts of a system without which it cannot function. 3 (context medicine plurale tantum English) vital signs

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ A pain like the worst toothache clutched her vitals .

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"organs of the body essential to life," c.1600, from noun use of adjective vital , perhaps on model of Latin vitalia "vital force," neuter plural of vitalis .