There isn't a single scientific name for blood itself. Blood is a complex tissue, and while we have names for its components, there's no formal scientific term encompassing the whole substance.

Here's how we refer to it in a scientific context:

* "Blood" is the common term used in most scientific fields.

* "Hematopoietic tissue" refers to the tissue that produces blood cells.

* "Hematologic system" refers to the complete blood system, including blood cells, plasma, and the organs involved in its production.

The terms used to describe blood components are:

* Plasma: The fluid portion of blood.

* Erythrocytes: Red blood cells.

* Leukocytes: White blood cells.

* Thrombocytes: Platelets.

So, depending on the specific context, different terms might be used to refer to blood.