biology unit 9 Flashcards
Describe the circulatory system
as a system of
blood vessels with a pump and valves to ensure
one-way flow of blood
State that blood
is pumped away from the heart in arteries and returns to the heart in veins
State that the activity of the heart may be
monitored by:
ECG, pulse rate and listening to sounds of valves closing
List the components of blood as:
red blood cells,
white blood cells, platelets and plasma
function of red blood cells
in transporting oxygen,
including the role of haemoglobin
function of white blood cells
in phagocytosis and
antibody production
function of platelets
in clotting
function of plasma
in the transport of blood cells, ions,
nutrients, urea, hormones and carbon dioxide
State the functions of:
lymphocytes
antibody production
state the function of phagoocytes
engulfing pathogens by
phagocytosis
State the roles of blood clotting
as preventing
blood loss and the entry of pathogens
Describe coronary heart disease in terms of
the blockage of coronary arteries and state
the possible risk factors including:
diet, lack of
exercise, stress, smoking, genetic predisposition,
age and sex
fish circulatory system
Fish have a two-chambered heart and a single circulation. This means that for every one circuit of the body, the blood passes through the heart once
Circulatory systems in Mammals
four-chambered heart and a double circulation
This means that for every one circuit of the body, the blood passes through the heart twice
The right side of the heart receives deoxygenated blood from the body and pumps it to the lungs (the pulmonary circulation)
The left side of the heart receives oxygenated blood from the lungs and pumps it to the body (the systemic circulation)
