Human Body Study Guide

The heart is divided into four sections called?

• valves
• arteries
• muscles
• chambers

The muscular system moves parts of the body

• True
• False

Which type of muscle squeezes and relaxes without stopping

• Cardiac muscle
• Smooth muscle
• Skeletal muscle
• Striated muscle

Bones meet at the

Your heart is about the size of

• an egg

• a tennis ball

• your fist

The saliva helps soften food and starts the digestion process.

• True
• False

Which body system provides nutrients to the body?

• Digestive system
• Muscular system

• Nervous system
• Respiratory system

Which body system sends and receives messages?

• Digestive system
• Respiratory system
• Nervous system
• Circulatory system

What happens to digestion if you do not chew your food long enough?

• Digestion slows down and causes discomfort in the esophagus and stomach

• Not chewing food speeds up digestion.

• There is not enough time for saliva to add liquid and soften the food.

• your teeth are not able to break the food down into smaller pieces

Supports the body and protects important organs.

• skeletal system

• muscular system

• nervous system

• digestive system