cardiovascular system Flashcards
role of the red blood cell?
to carry oxygen
role of the platelets?
-clots blood
-forms scabs
-stops bacteria from entering
what are the lumen sizes?
vein>artery>capillary
role of the white blood cell?
protect against harmful microorganisms
role of plasma?
-takes nutrients, hormones and proteins to the parts of the body that need it
whats the job of the circulatory system?
to transport substances around the body
what does the circulatory system consist of?
-the heart
-blood vessels
-blood
what are the three major blood vessels?
-veins
-capillaries
-arteries
what are the 4 components of blood?
-RBC
-WBC
-platelets
-plasma
how are red blood cells adapted to their job?
-increased surface area
-no nucleus
-haemoglobin
what side of the heart has oxygenated blood passing through it?
the left side
what side of the heart has deoxygenated blood passing through it?
the right side
whats the job of the heart?
to pump blood
the blood passes through the heart twice. what is this called?
double circulatory system
how do arteries structures relate to its function
tough and fexible to carry and cope with high pressure blood flow
Define organ
Group of different tissues working together to perform a specific function e.g. leaf
Define organ system
Group of organs working together e.g. plant transport system
how do capillaries structures relate to its function
thin to allow gasses to exchange
how do veins structures relate to its function
contain valves to prevent blood going back the wrong direction
What are the main differences in composition of blood taken from an artery to blood taken from a vein?
Artery carries more oxygen and glucose, veins carry more carbon dioxide than oxygen
what is the process of blood clotting
platelets clot blood to stop injurys bleeding
explain why people may have objections to heart transplants.
-Few donor hearts are available
-recovery time is long
-risk of rejection by the body’s immune system
what are the advantages of changing lifestyle to help heart problems
-Reduces the risk of developing cardiovascular disease
-very little cost to patient or NHS
-has other health benefits
what are the disadvantages of changing lifestyle to help heart problems
Some people may find making changes difficult.
what are the disadvantages of statins to help heart problems
-Not suitable for people with liver disease
-some side effects
-must be taken for life
what are the advantages of statins to help heart problems
-reduces the risk of heart attack studies have shown a decrease in cholesterol in the blood
what are the advantages of stents to help heart problems
-Widens coronary arteries that don’t respond to drug treatment
-recovery time is short
Function of vena cava
transports deoxygenated blood from the body to the heart
Function of the Pulmonary Artery
Transports deoxygenated blood from the heart to the lungs
Function of the aorta
Transports oxygenated blood from the heart to the body
Function of the Pulmonary Vein
Transports oxygenated blood from the lungs to the heart
Function of the Right Atrium
Pumps deoxygenated blood to right ventricle
Function of Right Ventricle
Pumps deoxygenated blood to the lungs
Function of Left Ventricle
Pumps oxygenated blood to the body
Function of the Valves
Prevents blood from back-flowing and helps pump the blood in the right direction
