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In vasodilation, where muscles in the vessel wall are relaxed, the central lumen is __________.

This type of muscle tissue has branched cells and intercalated discs.

The disadvantage of active transport is that the cell can selectively import or export regardless of a concentration gradient.

Match the following words:

Connective tissue is never exposed to the outside world.

Metacarpals make up the palm.

During the _____ phase estrogen builds the endometrium; while during the _____ phase progesterone stabilizes the endometrium.

Correctly match the following bone words:

A group of muscle fibers is called a(n) __________.

Metacarpals make up the palm.