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Connective tissue strands called _______, extend inward to divide lymph node into segments.

Precapillary sphincters regulate the flow of blood to tissues.

Valves are connected to the internal walls of the heart using

The great vessels are located at the apex of the heart

Yellow marrow actively generates new blood cells, while red marrow is dormant

Arteries anastomose more frequently than veins

The largest purely endocrine gland is the 

The largest arteries are called

Diapedesis is when circulating leukocytes leave the capillaries

Chief cells of the parathyroid gland produce parathyroid hormone (PTH), which