The conduction system initiates in the:

Which part of the heart conducts impulses from the AV node to the ventricles?

Which blood vessels supply the heart muscle with oxygen-rich blood?

Capillary blood collection is the preferred method for adult patients requiring multiple laboratory tests.

Correct depth for heel lancet in newborns:

What is the intrinsic rate of the SA node?

Which structure ensures one-way blood flow through the heart?

To stop bleeding after puncture:

What is the correct way to label tubes?

Capillary blood is a mixture of arterial, venous, and capillary blood with some interstitial and intracellular fluids.