• The blood transports absorbed amino acids, monosaccharides, and other molecules from the intestine to liver, and then to other organs (p. 576)
• The hepatic portal vein allows some absorbed molecules to have an enterohepatic circulation (p. 576)
• The intestinal absorption of vitamin B12 (needed for red blood cell production) requires intrinsic factor, secreted by the stomach (p. 566)
• Iron must be absorbed through the intestine to allow a normal rate of hemoglobin production (p. 371)
• The liver synthesizes clotting proteins, plasma albumin, and all other plasma proteins except antibodies (p. 580)
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.