Human Body Systems

What are the main organs of gas exchange?

• brain

• trachea

• lungs

• small intestines

Which list shows the levels of organization in a

complex organism, starting from the simplest

level?

• cell → organ → tissue → organ system →

  organism

• cell → tissue → organ → organ system →

  organism

• organism → organ system → organ → cell →

  tissue

• organism → organ → tissue → organ system →

  cell

In the human body, which of the following organs

connects to the sensory organs through nerves,

allowing an individual to utilize their senses?

• stomach

• brain

• heart

• lungs

What are the main functions of the human

skeleton?

• exchange of gases

• support and movement

• sensing the environment

• digestion and excretion

The job of tendons in the muscular system is to

• connect muscles to bones.

• control protein synthesis.

• transmit nerve signals.

• repair damaged cells.

Juana plays on a soccer team and kicked the

soccer ball to her teammate. What role did her

muscles perform?

• Her muscles carried blood to her legs.

• Her muscles made the energy for her legs.

• Her muscles stored minerals in her legs.

• Her muscles moved the bones in her legs.

What is the main function of the immune system?

• to stimulate the transmission of disease-fighting

  enzymes

• to recognize and attack disease-causing

  organisms

• to alert other systems in the body of foreign cells

• to maintain a constant flow of blood to wounds

The respiratory system supplies oxygen to the

blood in the body, while removing carbon dioxide.

Which system directly interacts with the

respiratory system to maintain homeostasis?

• the excretory system when it sends out liquid

  waste as urea

• the skeletal system when oxygen and glucose

  around the ribs are absorbed

• the nervous system when the brain regulates

  the body's breathing and heart rate

• the digestive system when food is broken down

  for nutrients

The circulatory system interacts with the immune system to

help the body maintain homeostasis by

• distributing white blood cells that attack disease

  across different organs.

• destroying harmful toxins.

• breaking down inorganic substances that can be

  used by different organs.

• causing the growth of muscles.

Liquid waste is held in the bladder until the

bladder sends information to the brain to

let the brain know that the bladder is full. The

brain controls the release of this waste. Which two systems are working together in this example?

• digestive and muscular

• circulatory and respiratory

• excretory and nervous

• immune and skeletal