Biology Flashcards
What is the plasma
Different types of cells floating in a liquid inside the blood
Blood contains?
Red blood cells, white blood cells and other smaller particles called platelets
What do red blood cells do
They transport oxygen and contain the pigment haemoglobin
White blood cells are part of
The immune system
What do white blood cells do
They destroy bacteria and foreign particles
What are the two main types of white blood cells
Phagocytes and lymphocytes
What do lymphocytes do
Produce specific antibodies which destroy viruses
What do phagocytes do
The carry out phagocytosis by engulfing bacteria
What do vaccines do
They allow a dead or altered form of the foreign particle to be introduced to the body so the immune system recognised it on exposure
What do platelets do
They help the blood to clot and reduce bleeding
What muscle is the heart made out of
Cardiac muscle
What are the four different chambers the heart is made out of
Right atrium left atrium right ventricle left ventricle
The fitter the person
The lower the resting heart rate
What do the arteries do
They carry blood away from the heart
What do the veins do
They carry blood back to the heart
What do veins contain
They contain valves which prevent back flow of blood
What are capillaries
They are small vessels which network between arteries and veins
Oxygenated blood is
Rich in oxygen
Deoxygenated blood is
Rich in carbon dioxide
What are the four major blood vessels leading to and from the heart called
Vena cava, pulmonary vein, pulmonary artery and aorta
What does the aorta do
It carries oxygenated blood away from the body
What does the vena cava do
It returns deoxygenated blood from the body back to the heart
What does the pulmonary vein do
Returns oxygenated blood from the lungs to the heart
What does the pulmonary artery do
It carries deoxygenated blood away from the heart to the lungs
