Intro !! Flashcards
what is blood?
-a specialized fluid (technically a tissue) composed of cells suspended in a liquid
-this liquid is called plasma
3 types of blood?
RBC
WBC
Platelets
Why do we need so many different cell types?
-fight infection
-transport oxygen
-prevent bleeding
name for production of blood?
haematopoiesis
where do blood cells come from?
-derived from a small pool of pluripotent stem cells capable of making all the different types of blood cells
where are sites of haematopoiesis (production of blood cells) in embryo?
-yolk sac then liver than marrow
-3rd to 7th month in spleen
site of haematopoiesis (production of blood cells) at birth?
-mostly bone marrow, liver and spleen when needed
site of haematopoiesis (production of blood cells) from birth to maturity?
number of actives sits in bone marrow decreases but retain ability for haematopoiesis
site of haematopoiesis (production of blood cells) in an adult?
As an adult not all bones contain bone marrow
-Haematopoiesis restricted to axial skeletol (skull, rib sternum, pelvis, proximal ends of femur)
what are parts of the axial skeleton?
skull, rib sternum, pelvis, proximal ends of femur