The Circulatory System Parts and Functions
Main Functions 1) Transports oxygen to the cells from the lung 2) Transports carbon dioxide from cells to the lung 3) Transports essential nutrients to the cells 4) Carries wastes from cells
3 Types of Circulation cardiac circulation—circulation of blood within the heart pulmonary circulation—from heart to lungs back to heart systemic circulation—from heart to body back to heart
The 3 main parts of The Circulatory system 1) Blood 2) The Blood Vessels 3) The Heart
Blood
The Composition of Blood The Plasma (Fluid) makes up 55% of the blood volume. The Solids (Cells) make up 45% of the blood volume.
Blood Plasma 97% Water Other 3% -Antibodies and Proteins - Nutrients and Wastes
Blood Solids Red Blood Cells -Carry oxygen -Contain Hemoglobin White Blood Cells -Attack bacteria & other invaders Platelets -Control the blood clotting process https://www.youtube.com/watch?v=--bZUeb83uU
Blood VESSELS
Types of Blood Vessels Arteries - carries blood away from the heart - usually oxygenated (one exception) Veins - carries blood towards the heart - deoxygenated (one exception) Capillaries -connect arteries/arterioles to veins/venules - exchanges carbon dioxide oxygen nutrients waste Exceptions: Pulmonary artery – artery leading from heart to lung (deoxygenated) Pulmonary vein – vein leading from lung to heart (oxygenated)
Overview of Blood Vessels Artery Arterioles Capillaries Venules Veins
THE HEART
Parts of The Heart The Atria (or Atriums) -Receiving Chambers The Ventricles -Pumping Chambers The Valves -Prevents backflow The Septum -Divides the Heart Heart Contraction and Blood Flow Animation: http://www.nhlbi.nih.gov/health/dci/Diseases/hhw/hhw_pumping.html
ANATOMY OF THE HEART
PATHWAY OF BLOOD Make a list the structures that a red blood cell would pass through when moving in and out of your heart.
PATHWAY OF BLOOD a. superior vena cava or 1)b. inferior vena cava right atrium tricuspid valve—(AV valve) right ventricle pulmonary valve—(semilunar valve) pulmonary artery (goes to lungs)
PATHWAY OF BLOOD 7) pulmonary vein 8) left atrium 9) bicuspid valve (left AV valve) 10) left ventricle 11) aortic valve (semilunar valve) 12) aorta
(3:30 min) http://www.youtube.com/watch?v=H04d3rJCLCE HEART SOUNDS Normal Sounds (48 sec): http://www.youtube.com/watch?v=NeMJXMSkA7g (3:30 min) http://www.youtube.com/watch?v=H04d3rJCLCE When you hear your heart beating, what are you actually listening to?
What causes a Heart Attack? http://www.nhlbi.nih.gov/health/dci/Diseases /HeartAttack/HeartAttack_Causes.html