A person had an infection of his Peyer's patches and developed intestinal cancer. How could these two events be related?
a. Peyer's patches filter lymph in the intestine and would have removed the cancer cells.
b. Peyer's patches contains lymphocytes that may have killed the cancer cells.
c. Peyer's patches remove abnormal red blood cells, including cancer cells.
d. Peyer's patches secrete hormones that suppresses the reproduction of cancer cells.

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.