The energy is food, or used up by activity, is measured in a unit called an

J, kJ

Explanation:

Energy is measured by J which stands for Joules and also kJ which stands for kilojoules.

There is also an older unit for measuring which is called kilocalorie or just calorie but most people are using joules for the measure

One kilojoule or one kJ is having 1000 J ( Joules) and it is easier to count with joules. One calorie is having 4.5 Joules (J).

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.

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