Very important role in regulating blood glucose level;
Very important role in the overall homeostasis of the body;
very important role in the breakdown of fats in the diet;
Very important role in regulating body temperature.
a closed, single circulatory system
an open, single circulatory system
a closed, double circulatory system
An open, double circulatory system
transport of oxygenated blood to the tissues of the body
Transport of de-oxygenated blood to the tissues of the body
Transport of oxygenated blood from the lungs
transport of de-oxygenated blood to the lungs
transport of oxygenated blood to the tissues of the body;
Transport of de-oxygenated blood to the tissues of the body;
Transport of oxygenated blood to the lungs;
transport of de-oxygenated blood to the lungs.
Heart, lymph vessels and blood;
Heart, arteries and veins;
Arteries, lymph vessels and veins;
heart, blood vessels and blood
a four-chambered muscular organ with two types of internal chamber - two atria and two ventricles
A three-chambered muscular organ with two types of internal chamber - one atrium and two ventricles;
a four-chambered muscular organ with two types of internal chamber - two atria and two veins
a four-chambered epithelial organ with two types of internal chamber - two atria and two ventricles.
Protection and defence
Localisation and lubrication;
Protection and lubrication
Localisation and defence
To ensure one-way flow of blood through the CVS;
To prevent oxygenated and de-oxygenated blood from mixing together
To ensure oxygenated and de-oxygenated blood mix together;
To prevent the blood supply to the brain from being over-loaded.
right and left semilunar valves
right and left atrio-ventricular valves
Right and left pulmonary valves.
Right atrio-ventricular valve
its cells are branched;
Its cells are connected by intercalated discs;
its structure is crucial in ensuring the co-ordinated pumping action of the heart
All of the above.
None of these
Aorta; carotid arteries;
Angina; pulmonary arteries
Aorta; pulmonary arteries
Atrium; pelvic arteries
Superior and inferior venae cavae; portal veins
Anterior and posterior venae cavae; cardiac veins
hepatic vein; jugular veins;
Superior and inferior venae cavae; pulmonary veins;
Atria, veins, venules, capillaries and arteries;
Arteries, capillaries, venules, arterioles, veins
Arteries, arterioles, capillaries, ventricles, veins
Sinuses, capillaries, arteries, veins, ventricles.
Arteries carry blood towards the heart; veins carry blood away from the heart;
Arteries carry blood that is poor in oxygen; veins carry blood rich in oxygen;
Arteries carry blood that is rich in oxygen; veins usually carry blood rich in fat;
Arteries carry blood away from the heart; veins carry blood towards the heart
It ensures blood flow is maintained when the heart is not contracting;
it ensures the appropriate distribution of blood to different tissues
It ensures arteries can contract actively;
It prevents too much blood accumulating in the veins.
Control of blood pressure is not important
Several different mechanisms are used to control blood pressure;
Blood pressure control systems work on both heart and blood vessels;
Control of blood pressure is cery important