a blood test/sample
He lost a lot of blood in the accident.
You can give blood at the local hospital.
I opened the door and screamed - in front of me was a man standing with hands covered in blood. (Preliminary English Test; B1; German)
We need some new blood in the organization.
Regardless of the age limit many companies encourage employees in high positions to retire after 55 as they want some new blood or probably a new look for the company. (International English Language Testing System; C1; Urdu)
He shot three policemen in cold blood.
Returning to the story, when I arrived, I went directly to Hillton Avenue where I should have met 005, but when I arrived at the meeting point I found him lying on the floor with two shots in his back; he had been murdered in cold blood. (Certificate of Proficiency in English; C2; Catalan)
I've got some Spanish blood in me.
I have a background in my blood which, I believe, explains my way of thinking: my mother is Dutch and my father is half from Alsace, half from Hungary. (Certificate of Proficiency in English; C2; French)
I heard a tapping on the window which made my blood run cold.
This thought scared me and made my blood run cold. (Certificate of Proficiency in English; C2; Turkish)
The way they have treated those people makes my blood boil.
Paul said something repulsive, with a cold light in his eyes, and it made her blood boil. (Certificate of Proficiency in English; C2; Polish)
I can't hate him - he's my own flesh and blood.
On the other hand, another problem old people have to face is a feeling of [not] being useful to society and what proves this is that they are put into old people's homes even by their own flesh and blood. (Certificate of Proficiency in English; C2; Spanish)