What are the endocrine glands? What chemical product is present in the endocrine system? WORTH 20 POINTS

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

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.

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?