Circulatory System Blood Vessels 2006-2007

Blood vessels __________ arterioles __________ venules __________ veins artery arterioles venules arterioles __________ venules __________

Arteries: Built for their job ________________ __________________________ _____________________ provide strength for high pressure pumping of blood elastic & stretchable

Major arteries ________ __________= to head to brain & left arm to right arm to body ___________ ________ ___________ __________= to lungs coronary arteries

Coronary artery bypass bypass surgery

Veins: Built for their job Blood flows toward heart _______________________ ______________________ blood travels back to heart at low speed & pressure why low pressure? far from heart blood flows because muscles contract when we move squeeze blood through veins valves in large veins in larger veins one-way valves allow blood to flow only toward heart Open valve Closed valve

Major Veins _____________ ____________= from upper body ___________ __________= from lung __________ _________= from lung __________ _____________= from lower body

Structure-function relationship ____________________ __________________ __________________ __________________ __________________ __________________ __________________ __________________ body cell waste CO2 O2 food

Circulation of Blood 2 part system Circulation to lungs ____________________ ____________________ ____________________ Circulation to body lungs heart body Circulation to body

Vertebrate circulatory system 2 part system lungs artery to lungs vein from lungs to heart heart vein from body to heart artery to body body

Stops along the way… Lungs Small Intestines Large Intestines Liver ______________________ ______________________ Small Intestines Large Intestines Liver

More stops along the way… Kidneys _____________________ _____________________ Bone Spleen

Circulatory System & Homeostasis ATP Homeostasis keeping the internal environment of the body balanced ___________________________________ Exercise ___________________________ need more ATP bring in more O2 & food; remove more CO2 & waste out Disease _____________________________________ need to work harder to bring in O2 & food & remove wastes CO2 O2 food waste

Have a heart? Ask Questions!! 2006-2007