Ask Dr. Universe

Why Do We Need Blood?

Episode 16 | 1m | Video has closed captioning.

Like water and oxygen, our bodies need blood, but why is that? Find out the answer in the latest episode of Ask Dr. Universe! Ask Dr. Universe is produced in partnership with Washington State University and Northwest Public Broadcasting. If you have a science question of your own, upload it to

Aired: 11/04/21

Rating: NR

Problems Playing Video? | Closed Captioning

Ask Dr. Universe is a local public television program presented by NWPB.