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This type of vessel has a wall made up of only simple squamous epithelium, which is perfectly suited for diffusion.

This collection of cells sets the pace of the heart beat:

This is the largest heart chamber:

What is the key structure in the vessels closest to the heart that allows these vessels to expand and contract to allow pulses of blood to move through and maintain blood pressure gradients?

Which of the following are uses of glucose that we get from our diet?

Which reflects the correct direction of filtrate flow through a nephron?

What microscopic structure increases surface area for nutrients to be absorbed?

During days 0-5 of the uterine cycle, which hormone is low?

When a person exercises, the rate of cellular respiration ______________ in order to make more _______________.  A bi-product of this is more ______________.

Match the type of vessel to its description.