Heart: The multicellular, chambered, muscular structure that pumps blood through the circulatory system by alternately contracting and relaxing.

 

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Heart: The multicellular, chambered, muscular structure that pumps blood through the circulatory system by alternately contracting and relaxing.

Heart Rate: The number of times your heart beats per minute.

Coronary Heart Disease (Chd): Diseases of the heart muscle and the blood vessels that supply it with oxygen, high risk factor for a heart attack.

Maximum Heart Rate: The maximum number of times your heart should beat in a minute without dangerously overexerting yourself.

Recovery Heart Rate: Heart rate taken at the end of the exercise. The amount of the time it takes for your heart to recover to how it was before the exercise began.

Target Heart Rate Zone: The number of heartbeats per minute reflecting the exercise intensity that gains the maximum training benefits from an aerobic workout. The formula for obtaining a target heart rate equals 2 . . . View Full Definition

Resting Heart Rate: Number of times the heart beats per minute while your body is not phisically active or at rest.

Congestive Heart Failure: The inability of the heart muscle to pump the blood at a life sustaining rate.

Heartwood: Inner rings of xylem that have become clogged with metabolic by-products and no longer transport water; visible as the inner darker areas in the cross section of a tree trunk.

Lymph Hearts: Contractile enlargements of vessels that pump lymph back into the veins; found in fish, amphibians, and reptiles.