Diagram showing heart control. Four words are listed on left side with green arrows pointing up beside them. At the bottom is heart rate, above that is sympathetic activity, above that is oxygen requirement and energy requirements is at the top. A think green arrow is between each word pointing downward. In the middle of the diagram the heart is shown at the bottom and the hypothalamus is shown at the top. A blue line is drawn between the heart and hypothalamus with O2, CO2 and BP written above the heart. Red and green circular arrows are drawn from the hypothalamus to the heart. One on the left and one on the right. On the right side of the diagram four words are listed with a red arrow pointing downward beside them. At the bottom is heart rate, above that is parasympathetic activity, above that is oxygen requirement and energy requirements is at the top. A thin red arrow is draw pointing down between each word.

Heart Rate: A Potential Tool for the Improvement of Feed Efficiency and More