Human Body Systems and Functions

Which of the following correctly lists the levels of organization in the human body from simplest to most complex?

• Organ, Tissue, Cell, Organ System

• Cell, Tissue, Organ, Organ System

• Tissue, Cell, Organ System, Organ

• Cell, Organ, Tissue, Organ System

What is the true color of human blood inside the body?

• Blue, then turns red when exposed to oxygen.

• Always red, though the shade can vary with oxygen levels.

• Blue in veins and red in arteries.

• Green, due to the color of veins under the skin.

Where does most of the nutrient absorption occur in the digestive system?

• Stomach

• Large Intestine

• Small Intestine

• Mouth

Which of the following is an example of metabolic waste that the body needs to excrete?

• Undigested food (feces)

• Carbon dioxide

• Water

• Nutrients

What type of cells make up the outermost layer of the epidermis?

• Live cells

• Nerve cells

• Cornified cells

• Muscle cells

What is a primary role of the lymphatic and immune system?

• To help with digestion

• To move the body's limbs

• To protect the body from pathogens

• To produce reproductive cells

Which type of muscle tissue is found in the heart?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

• Voluntary muscle

What are the two main divisions of the nervous system?

• Brain and spinal cord

• Central and Peripheral

• Voluntary and Involuntary

• Neurons and Glia