CVS 5

Vocabulary flashcards related to the extrinsic control of the heart.

Cardiac Output (CO)

Volume of blood pumped from the left ventricle every minute.

Cardiac Output

Heart Rate (HR) x Stroke Volume (SV)

Heart Rate (HR)

Beats per minute

Stroke Volume (SV)

Volume pumped from the left ventricle in a single beat

Sympathetic System

Boosts Cardiac Output

Parasympathetic System

Reduces Cardiac Output

Autonomic System

Influence Heart Rate (i.e. contraction rate) and Stroke Volume (i.e. contraction strength)

Cardiovascular Centres in Medulla Oblongata

Cardioinhibitory Centre (Parasympathetic System) & Cardioacceleratory Centre (Sympathetic System)

Baroreceptors

Detect changes in blood pressure

Chemoreceptors

Detect changes in blood chemistry (CO2, O2, pH)

Aortic Bodies

Located near aortic baroreceptors

Carotid Bodies

Located near carotid baroreceptors