Anatomy Quiz week 1

The human body is organized by _______ different levels of structure.

• billions of

• thousands of

• hundreds of

• four

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Cells are the ___________ _____ of living matter.

• complex units

• simplest units

• organized units

• disorganized

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A system is an organization of varying numbers of _____ so arranged that together they can perform complex functions.

• organs

• volunteers

• organic mqtter

• systems

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The human skeletal system makes up approximately 20% of a person's _____ and helps in motion, protection of internal organs, storage of minerals, and production of blood cells.

• subsurface area

• area

• body weight

• personality

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The primary purpose of the cardiovascular system is to circulate _____ throughout the body.

• body fluids

• blood

• rumors

• plasma

The respiratory system supplies a continuous supply of ______to the body cells and helps regulate the pH of your blood.

• metabolic particles

• oxygen

• helium

• food