Heart Function and Biological Systems

This comprehensive page covers three main biological systems: cardiac function and treatment, blood circulation, and plant transpiration. The content begins with various heart treatments and anatomical structures, transitions to blood vessel characteristics, and concludes with plant biology and gas exchange.

Definition: Coronary heart disease treatments include stents (metal mesh devices), statins (cholesterol-lowering medications), and valve replacements.

Highlight: The left ventricle has a thicker muscular wall because it must pump blood throughout the entire body.

Vocabulary: An artificial pacemaker is a device that helps regulate irregular heartbeats by sending electrical signals to the heart.

Example: The potometer is used for measuring plant transpiration rates, consisting of a reservoir, capillary tube, and volume scale.

Definition: Factors affecting transpiration include temperature, humidity, airflow, and light intensity, with transpiration occurring more rapidly in hot, dry, windy, or bright conditions.

The page includes detailed diagrams showing:

• Heart structure with labeled chambers and vessels
• Blood vessel anatomy
• Respiratory system components
• Plant transpiration mechanisms
• Alveolar gas exchange

Highlight: Stomata in plant leaves serve dual purposes: allowing CO₂ entry for photosynthesis and controlling water loss through transpiration.