Soc 16 Structure Of Blood Vessels And Heart Flashcards
What do arteries do
Take oxygenated blood away from the heart
What is structure of arteries
Thick walls and elastic
How does the arteries adapt to transfer blood to working muscles
The lumen widens to allow more blood through so it can flow faster
What does pulmenary arterie carry
De-oxygenated blood away from heart
What do veins do
Carry blood into the heart
What is the structure of veins
Thin walls and not elastic
How do veins adapt to complete their job
Have many valaves which helps prevent backflow of blood
What does the pulmanary vein do
Carries oxygenated blood to the heart
What is the structure of capillaries
One cell thick
What do capillaries do
Allows diffusion of gases and nutrients from blood into body cells
What happens at the capillaries
Gaseous exchange
What are the two phases called for when the heart pumps blood
Systolic then diastolic phase
What are the four different componants of blood
Red blood cells, white blood cells, plasma, platelets.
What do red blood cells do
Transport oxygen from the lungs to the bodys cells and carbon dioxide from the body cells to the lungs.
What do white blood cells do
They produce antibodies to fight against infection and diseases
