Hemostasis means control of bleeding
it is constant internal chemical composition

Primary hemostasis is the overall sequence of events that leads to the formation of a platelet plug, while Secondary hemostasis is the signal transduction pathway that leads to the formation of fibrin. Secondary Hemostasis is always a part of Primary hemostasis, but involves many clotting factors and other signaling molecules that are specific to the formation of fibrin

Hemostasis means control of blood flow. Hematopoeisis means blood formation.

Hemostasis is the control of blood flow.
Hemostatsis
hemostasis
It is called a blood clot if it occurs naturally.

it promotes vasoconstriction