Blood - Cells & Vessels Flashcards
What is the composition of blood
55% plasma, 45% platelets
What is blood
type of connective tissue
What are erythrocytes
Red blood cells
What are the characteristics of erythrocytes
no nucleus, no DNA
What are leukocytes
white blood cells
What are leukocytes involved in
immune response
describe erythrocyte shape
biconcave
Why is erythrocyte shape biconcave
increase SA - pack haemoglobin
How are erythrocytes prodcued in adults
erythropoiesis
Where are erythrocytes produced in embyros
yolk sac
Where are erythrocytes produced post natally
bone marrow
what is erythrocyte production controlled by
erythropoietin
where is erythropoietin produced
kidney
what does erythropoietin stimulate
erythrocyte production
What is the effect of erythropoietin
increases stickness of blood
what is erythropoietin
hormone
What are reticulocytes
immature red blood cells
describe the structure of reticulocytes
anucleate, lots of RER
How are leukocytes formed
leukopoesis
what are the main types of leukocyte
agranulocytes, granulocytes
What are the types of agranulocytes
lymphocytes, monocytes
What are the types of granulocytes
neutrophils, eosinophils, basophils
what are granulocytes involved in
intracellular processes
What are the three layers in blood vessles
intima, media, adventitia
what is leukopenia
decreased white blood cells
Describe the pressure in the pulmonary system
low
Describe the pressure in the systemic system
high
What vessel maintains blood pressure
muscular arteries
Which blood vessel layer is large in arteries
media
TRUE or FALSE - capillaries have pores
TRUE
Describe the intima layer
simple, squamous endothelium
Describe the adventitia layer of blood vessels
connective tissue, external elastic layer
