Cytoplasm i believe. hope this helped
Hello!
The heart is kind of like the "base" or "hub" for blood. The heart will send of blood and receive blood, and send it off again. It allows for blood to be bumped through the whole body.
I hope this helps!
You have the bone marrow and the circulating blood
C) have higher resolution that allows you to view smaller specimens
Endoplasmic Reticulum aka the ER :)