Glossary
Chapter 6

Alveoli	Air sacs in the lungs where gas exchange (oxygen and carbon dioxide) takes place.
Blood lipids (fat)	Cholesterol and triglycerides.
Blood pressure	A measure of the force exerted against the walls of the vessels by the blood flowing through them.
Bradycardia	Slower heart rate than normal.
Capillaries	Smallest blood vessels carrying oxygenated blood to body tissues.
Cardiac output	Amount of blood pumped by the heart in one minute.
Diastolic blood pressure	Pressure exerted by blood against walls of arteries during relaxation phase (diastole) of the heart; lower of the two numbers in blood pressure readings.
Mitochondria	Structures within the cells where energy transformations take place.
Recovery time	Amount of time the body takes to return to resting levels after exercise.
Sphygmomanometer	Inflatable bladder contained within a cuff and a mercury gravity manometer (or aneroid manometer) from which the pressure is read.
Stroke volume	Amount of blood pumped by the heart in one beat.
Systolic blood pressure	Pressure exerted by blood against walls of arteries during forceful contraction (systole) of the heart; higher of the two numbers in blood pressure readings.
Vigorous exercise	Cardiorespiratory exercise that requires an intensity level above 60 percent of maximal capacity.
Warm-up	Starting a workout slowly.
Workload	Load placed on the body during physical activity, which determines the intensity of exercise.

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