Components of blood Flashcards
define the circulatory system
the body’s transport system consisting of the lungs, heart, blood vessels and blood
What are the components of blood
-plasma
-red blood cells
-white blood cells
-platelets
role of plasma
transports gasses, nutrients, waste products and other blood components
role of red blood cells
contain haemoglobin and transport oxygen to the body’s tissued
role of white blood cells
attack pathogens by engulfing them or by producing anti bodies
role of platelets
clot at an open wound to seal it and prevent excessive bleeding to prevent pathogens from entering the blood stream
describe the function and structure of arteries
-transport oxygenated blood away from the heart at high pressure
-thick walls
-narrow lumen
describe the structure and function of veins
-transport deoxygenated blood towards the heart at low pressure
-wide lumen
-contains valves
describe the structure and function of capillaries
-tiny blood vessels that surround the body’s tissues
-walls are one cell thick
-extremely narrow lumen