What is the purpose of the circulatory system?

What is the name for the circulatory system that moves blood to and from the lungs?

What is the name for the circulatory system that moves blood to and from the body?

The substance that makes up the majority of blood is:

The components of blood that aids the most in blood clotting is

Blood vessels carrying blood into tissues where materials can be exchanged by diffusion are:

The components of blood that protect against pathogens is

Blood vessels carrying blood into the heart are:

Blood vessels carrying deoxygenated blood into the lungs are:

Which phase of an ECG signals when the ventricles contract?

Which phase of an ECG signals when the ventricles relax?

The pacemaker of the heart is the

Electrical fibres running through the ventricles are called

Arthropods have which type of circulatory system?

Leukocytes that are involved in inflammation are

Leukocytes that are involved in engulfing pathgens are

Blood vessels with valves to prevent backflow of blood are:

Blood vessels with extremely thin walls are:

The part of blood that carries oxygen to cells is: