Cardiovascular System Chapter 3.1
Circulatory System Delivers blood to all the cells of the body Includes: Heart Blood Veins Capillaries Arteries
Function of the Cardiovascular System Transports substance around the body Hormones Oxygen Nutrients from food Cellular waste
The Heart Is an organ A Pump 4 chambers Made of mostly cardiac muscle ~ the size of your fist almost in the center of your chest.
Heart Chambers The Atriums are the upper chambers… They send blood to the ventricles Left Atrium Right Atrium Right Ventricle Left Ventricle The Ventricles (work horse) are the lower chambers Send blood out of the heart
Right side of the Heart Oxygen-poor blood from the body comes into the right atrium Passes through the tricuspid valve to the right ventricle Passes to the pulmonary arteries and onto the lungs. What do you think the valves are for?
Left side of the Heart Oxygen-rich blood comes in from the lungs to the left atrium Passes to the left ventricle through the bicuspid valve Passes to the body through the aorta.
Blood vessels Arteries Arterioles capillaries venules veins
Arteries A for Away Arteries take blood away from the heart. Thick elastic walls lined with smooth muscles. Heartbeat pumps blood at a high pressure Called Blood Pressure Stretch to withstand this pressure Called pulse
Ventricles and Arteries: Pumping Blood from your Heart Blood leaves the Heart through two ARTERIES. Artery Artery Right Ventricle Left Ventricle The Heart pumps blood through Arteries to the Lungs to collect Oxygen. The Heart pumps blood through Arteries to supply Oxygen to the Body.
Capillaries Exchange site between body and blood. Ex. nutrients, O2, CO2, and waste Very thin=cells travel through in single file.
Veins Return blood to the heart. Need valves to keep blood flowing in one direction.
Atriums and Veins: How Blood gets into your Heart Blood enters the Heart through two VEINS. Veins Left Atrium Right Atrium The Body sends blood with no Oxygen in it through veins to the Heart. The Lungs send blood with Oxygen in it through veins to the Heart.
Two types of Circulation Pulmonary Circulation Circulation between heart and lungs Systemic Circulation Circulation between heart and body
Heart Structure Aorta Superior Vena Cava Pulmonary Artery Pulmonary Vein Right Atrium Tricuspid Right Ventricle Inferior Vena Cava Left Atrium Bicuspid Aortic Semilunar Valve Left Ventricle Descending Aorta ******Parts to ADD 16. Septum 17. Pulmonary Semilunar valve 18. Myocardium 17. 16. 18.