Blood platelets Flashcards
1
Q
What are platelets?
A
Fragments of megalokaryocytes
Large cell in red bone marrow
2
Q
What do megalokaryocytes and platelets develop from
A
hematopoietic stem cells in response to thrombopoietin
3
Q
What do platelets do
A
Help repair damaged blood vessels by adhering to their broken edges
Stoppage of bleeding called haemostasis
4
Q
What is number of platelets
A
150,000-400,00 per mm3 of blood
5
Q
How long do platelets live?
A
10 days
