The Circulatory system The Transportation System

The Circulatory System http://www.gamequarium.org/cgi- bin/search/linfo.cgi?id=12096 Composed of heart, blood vessels and blood Function: transport materials throughout the body to cells and take waste products away from cells

The Heart - the pump 4 Chambers left and right atria receive blood to the heart left and right ventricles pump blood away from the heart Valves open to allow blood to pass through and close to prevent backflow Sinoatrial node – area above the right atrium that generates a normal sinus rhythm (causes the heart to beat)

The Heart – the pump http://www.argosymedical.com/Circulatory/sample s/animations/Heart/index.html http://www.medicalook.com/Heart_diseases/

The Blood Vessels – the highways Artery – carries blood away from the heart Vein – carries blood toward the heart Capillaries – connect arteries and veins; they are so thin that nutrients and oxygen diffuse right through them

The Blood – the trucks & police http://www.argosymedical.com/Circulatory/samples/a nimations/The%20Blood/index.html Composed of plasma – yellowish liquid part of blood that carries nutrients, clotting factors, sugar, hormones, etc. red blood cells – erythrocytes - made in the bone marrow - carry oxygen and carbon dioxide – hemoglobin gives them the red color white blood - leukocytes – made in bone marrow, lymph tissue, thymus, spleen – defend the body against invaders platelets - thrombocytes – aid in clotting of blood – formed in bone marrow