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24 Cards in this Set

  • Front
  • Back

Cardiorespiratory system

A system of the body composed of the cardiovascular and respiratory systems

Cardiovascular system

A system of the body composed of the heart, blood, and blood vessels

Heart

A hollow muscular organ that pumps a circulation of blood through the body by means of rhythmic contractions

Medistinum

The space in the chest between the lungs that contains all the internal organs of the chest, except the lungs

Sinoatrial node (SA)

A specialized area of cardiac tissue, located in the right atrium of the heart, which initiates the electrical impulses that determine the heart rate. Pacemaker of the heart

Atrioventricular node (AV)

A small mass of specialized cardiac muscle fibers, located in the wall of the right atrium of the heart. Receives the heartbeat impulses from the sinoatrial node and directs them to the walls of the ventricles

Atrium

The superior chamber of the heart that receives blood from the veins and forces it into the ventricles

Ventricle

The inferior chamber of the heart that receives blood from its corresponding atrium... forces blood into the arteries

STroke volume

The amount of blood pumped out of the heart with each contraction

Heart rate

The rate at which the heart pumps

Cardiac output

Heart rate x stroke volume



Overall performance of the heart

Blood

Fluid that circulates in the heart, arteries, capillaries, and veins. Carries nutrients and oxygen to all parts of the body. Rids body of waste products


Blood vessels

Network of hollow tubes that circulates blood throughout the body

Arteries

Vessels that transport blood away from the heart

Capillaries

Smallest blood vessels. Where blood/tissues exchange chemicals and water

Veins

Vessels that carry blood from the capillaries towards the heart

Arterioles

Small terminal branches of an artery, which end in capillaries

Venules

The very small veins that connect capillaries to the larger veins

Respiratory system

Lungs and respiratory passageways



Collects oxygen from the external environment and transports it to the bloodstream

Respiratory pump

Composed of skeletal structures (bones) and soft tissues (muscles). Work together to allow proper respiratory mechanics to occur and to help pump blood back to the heart during inhalation

Inspiration

Contracting muscles to mvoe air into the body -- inhale

Expiration

Relaxing the inspiratory muscles to move air out of the body - exhale

Diffusion

The process of getting oxygen from the environment to the tissues of the body

Maximal oxygen consumption

The highest rate of oxygen transport and utilization achieved at maximal physical exertion