The Venous System

Front 1

THE VENOUS SYSTEM Functions as a collection of blood from capillary beds to transport the blood back to the _____

Back 1

heart

Front 2

THE VENOUS SYSTEM is a Blood ______ of the circulation: veins hold about six times the volume contained in the arteries.

Back 2

reservoir

Front 3

Venous Compliance (Cv) is about 15 - 20 times ____ than arterial compliance (Ca).

Back 3

greater

Front 4

Veins are often called "capacitance vessels", since they can accept greater _____ per increment of pressure than arteries.

Back 4

volumes

Front 5

The ______ to the heart is defined as the volume of blood per unit time (ml/min) flowing into either the right atrium or left atrium via systemic or pulmonary veins, respectively.

Back 5

Venous return (VR)

Front 6

In the steady state, cardiac output and _______ must be equal.

Back 6

venous return

Front 7

The dominant factor influencing venous return is the pressure gradient between the ______ and the _____.

Back 7

capillaries
atrium

Front 8

_________ contractions effect venous return by compressing veins, forcing blood toward the heart. Venous valves prevent backf low.

Back 8

Skeletal muscle

Front 9

______ results in decreased intrathoracic pressure augments systemic venous return to the right side of the heart.

Back 9

Inspiration

Front 10

during _____ systemic venous return to right heart diminishes

Back 10

Expiration

Front 11

Extrathoracic veins can temporarily collapse near thoracic entry points, if ______ effort causes venous pressure to become sub-atmospheric.

Back 11

inspiratory

Front 12

_____ is the relative state of contraction of venous smooth muscle

Back 12

Venomotor tone:

Front 13

Constriction of veins shifts blood _____ the heart

Back 13

toward

Front 14

a. Hydrostatic pressure affects arterial and venous blood pressures equally, so _______ pressure for flow is unaffected in the systemic circulation.

Back 14

driving

Front 15

Hydrostatic pressure increases venous ______ pressure and degree of distension. In upright postures, blood can accumulate in the veins below the level of the heart and reduce venous return ("venous pooling").

Back 15

transmural

Front 16

Venous return is directly proportional to ______

Back 16

total blood volume

Front 17

Venous return determines the degree of filling of the ventricles during diastole, and thus the ____ of the myocardial fibers prior to contraction

Back 17

lengths