Circulatory system Flashcards
Arteries
blood vessels carrying oxygenated blood away from the heart and to the tissues
Veins
blood vessels carrying blood toward the heart to remove waste and pick up more oxygen
Capillaries
fine-branching blood vessels forming a network between the arterioles and venules, where transport of nutrients and oxygen or carbon dioxide occurs on a microscopic scale
Arterioles
the smaller branches of the arteries leading to the capillaries
Venules
the small branches of the veins gathering blood from the capillaries
Heart
The heart beats about 100,000 times per day.
For every minute of work, the heart pumps five (5) to six (6) quarts of blood around the body.
Atrium
one of the two upper cavities of the heart passing blood to the ventricles. The plural is “atria.”
Ventricle
one of the two lower cavities of the heart passing blood to the body or to the lungs
Pulmonary arteries
blood vessels moving blood from the heart to the lungs
Pulmonary veins
blood vessels returning oxygenated blood to the heart from the lungs
Aorta
the main artery in the body that supplies oxygenated blood to the circulatory system
Superior vena cava
the blood vessel moving blood from the upper body and head to the heart
Inferior vena cava
the blood vessel moving blood from the lower body to the heart
Atrioventricular (AV) valves
valves between the atria and ventricles preventing the backward flow of blood during cardiac contractions
Sinoatrial (SA) node
the pacemaker of the heart that generates the first electrical signal of a heartbeat and stimulates the atria to contract