Chapter Test Body Systems

After reading the passage, explain in YOUR OWN WORDS how flexors and extensors work.

The muscle pair that contracts, or bends the muscle, is called the ______.

• flexor

• extensor

The muscle pairs that extends, or straightens the muscle, is called the ________.

• flexor

• extensor

Two muscles work together to move the elbow joint. Which of the muscles acts as the extensor?

• triceps

• biceps

• deltoid

______ system is the body system made up of parts that cover and protect the body.

The largest organ in the body is the ___________.

• liver

• pancreas

• skin

• large intestine

This diagram represents the parts of the _______.

• skin
• sweat glands

• hairs in the nose

Select the parts of the integumentary system:

• 
• 
• 
• 

Melanin protects the skin from the infrared rays of the sun.

• true

• false

The __________ is the body system that serves as a support framework. This body system

holds the body together, protects inner body parts, and helps with movement.