Explain why the heart can be considered the muscle with the greatest elastic strength.

The hearts contraction that maintains our blood pressure allowing us to breathe and exchange gases at all levels of respiration, ensuring oxygen is provided to all cells of the body, and waste products are eliminated.

The heart pumps 2 ounces (71 grams) of blood at every heartbeat

The heart pumps 2,500 gallons (9,450 liters) of blood each day.

The heart beats over three billion times in a person’s lifespan

e2020 answer

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measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.