Chapter 13 : The Vessels of the Heart Flashcards
Right Atrium receives blood from
Superior and Inferior Vena Cavas and Coronary Sinus
Superior Vena Cava receives blood from
The upper body
Inferior Vena Cava receives blood from
The lower body
The type of blood the Vena Cavas receive
Deoxygenated blood
Right Ventricle pumps blood to
Pulmonary trunk (right and left pulmonary articles)
Coronary Sinus receives blood from
Pericardium (heart walls)
The only arteries that carry de-oxygenated blood
Right and left pulmonary articles
Left Atrium receives blood from
Pulmonary veins
The only veins that carry oxygenated blood
Pulmonary veins
Aorta
Branches and sends blood to the rest of the body
(Coronary) Cardiac Arteries
First left and right minor branches of aorta feed oxygenated blood to the heart
(Coronary) Cardiac Veins
Collect blood form the heart tissues and open into a large vein called the coronary sinus
3 Main Branches of the Aorta Arch
Left Common Carotid Artery
Left Subclavain Artery
Brachiocephalic Artery
Left Common Carotid Artery
First Branch from the aorta that takes oxygenated blood to the head and neck
Left Subclavian Artery
Branch that sends oxygenated blood to the left arm
Brachiocephalic Artery
Main branch that splits to form the Right Common Carotid Artery and the Right Subclavian Artery that take oxygenated blood to the head/neck and right arm
The Aorta Arch continues on to form the
Thoracic and Abdominal aortic arteries that suppy oxygenated blood to the entire lower body
Artery
Strong, elastic vessels that carry blood away from the heart under high pressures (mainly oxygenated blood)
Arteriotes
Small branches off of arteries
Capillaries
Small branches off of arteriotes, meet up with the cell membranes of tissue cells in the body and alveolar cells (air sacs) in the lungs
Gas exchange
simple diffusion of O2 and CO2 that happens between the slits of the epilthealial cells
Gas exchange in the lungs
Oxygen enters the blood; carbon dioxide leaves the blood
Gas exchange in the body
Carbon dioxide enters the blood; oxygen leaves the blood
Pulse
Expansion and recoil of the artery walls caused by the increase pressure created by the heart pumping
Blood is moved by
Muscle contraction
Pressure created through breathing
One way valves that prevent backflow
Cardiac Conduction System
Clusters of muscle fibers that do not contract, but act to spread impulses throughout the heart
Sinatrial node
(S-A Node) located in right atrium, without nerve stimulation these cells conduct impulses that spread to other cardiac fibers causing them to contract
Sinatrial node also known as
The pacemaker
Atrioventricular Node
(A-V Node) located in inferior septum of atria, impusles travel slower allowing for the slight pause while the atria empty and the ventricles fill
Purkinje Fibers
Connects to papillary muscles in the walls of the ventricles to stimulate ventricular contraction