Human Body Systems

Front

Muscular tube connecting the mouth to the stomach

Back

Esophagus

Front

Skeletal muscles are: Voluntary or Involuntary?

Back

Voluntary

Front

What occurs in the lungs?

Back

Where the exchange of gas occurs. Oxygen enters and carbon dioxide exits.

Front

Skin is what line of defense in the immune system?

Back

First

Front

Where does most chemical digestion take place?

Back

Small Intestine

Front

What is the main function of the esophagus?

Back

To transport food from the mouth to the stomach.

Front

What type of muscle is responsible for involuntary movements?

Back

Smooth muscle.

Front

What is the role of the small intestine in digestion?

Back

Absorption of nutrients from digested food into the bloodstream.

Front

What is the primary function of the respiratory system?

Back

To facilitate the exchange of oxygen and carbon dioxide.

Front

What is the largest organ of the human body?

Back

Skin.