Circulation is the transfer of blood through the circulatory system to transport nutrients, oxygen and waste
substances
Plasma: liquid part of the blood
BLOOD
Red blood cells: carry oxygen
Components
Blood cells:
White blood cells: defend us from infections
Platelets: deal with coagulation
Elements of
the circulatory
system
HEART
Organ that pumps blood continuously. It has four cavities: two atria and two ventricles
ARTERIES: They carry blood from the heart to the organs of the body
BLOOD VESSELS
VEINS: They carry blood from the organs of the body to the heart.
BLOOD CAPILLARS: They communicate the arteries and veins
The blood never leaves the circulatory system
Pulmonary circulation: blood flow between the heart and lungs to collect oxygen and
release carbon dioxide
Circulation
Make two circuits
General circulation: blood flow throughout the body, except the lungs to distribute
nutrients and oxygen and collect waste substances