Option H of the IB HL Biology syllabus is the Further human physiology. IBO recommends to spend 22 hours on this topic.
This topic has 6 sub-chapters: "Hormonal control", "Digestion", "Absorption of digested food", "Function of the liver", "The transport system" and "Gas exchange". Each are separated with numerical values in order of mentioned.
These are all HL option syllabus statements, it is recommended to bring a Casio Graphical Calculator instead of Texas.