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GCSE Combined Science · key term
The muscle tissue in the heart wall that contracts rhythmically to generate pressure and pump blood.
Used by OCR
Specification B2.2d · Biology Paper 1
Revise: Heart and Blood Vessel AdaptationsThe mammalian heart keeps blood moving by generating pressure. Its walls contain cardiac muscle, which contracts and relaxes rhythmically throughout life. When a chamber contracts, its volume decreases and the pressure inside rises, pushing blood onwards.
Biology, Combined Science
State exactly where a valve prevents backflow. Valves do not pump blood: cardiac muscle generates the pressure that moves it.
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The specialised muscle forming the heart wall, which contracts repeatedly to pump blood.
The heart wall contains cardiac muscle. Its repeated contractions generate pressure that moves blood. Cardiac muscle cells contain many mitochondria to support aerobic respiration, supplying the energy needed for continuous contractions.
