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.
It will give new opportunities to new generations and thus will [provide] new blood in the differe[n]t organisations. (International English Language Testing System; C1; Arabic)
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)