Electrical signals pass quickly from one cardiomyocyte to another through the _________________ of the intercalated discs.

Blood flows faster in a venule than in a capillary because venules

Where is the vasomotor center located?

When the left ventricle contracts, the ________________ valve closes and the _______________ valve is pushed open.

What is the most important force in venous flow?

What organ contains the cardio-accelerator and cardio-inhibitory neurons that assist in the regulation of heart rate? 

An individual has type B, Rh positive blood.  The individual has ___________________ antigens and can produce anti- __________________________ antibodies.

What is taken up by capillaries at their venous end ?

The opening and closing of heart valves is caused by _______________________.

Laminar flow is the normal condition for blood flow throughout most of the circulatory system. It is characterized by concentric layers of blood moving in parallel down the length of a blood vessel.  Which of the following factors has the greatest affect on laminar flow?