Harcourt Science Ch. 4: The Human Body

A blood vessel that carries blood TO the heart is a ____________________.

What type of muscles work in pairs to move bones back and forth?

Your body has 3 types of muscles - striated muscle, smooth muscle and

This body system brings oxygen to all the cells in your body. What is it called?

_______________ helps soften food.

Which TWO systems take in oxygen and move it around the body?

The brain is made of these very special cells. If they are damaged, they cannot be replaced.

Cells of the same type work together to form _____

This system is the message center of the body. It is always sending and receiving messages.

Blood LEAVES the heart through blood vessels called....

Which part of the digestive system makes food mostly liquid?

The mouth, esophagus, stomach, & small intestine make up the __________________ system.

Which systems work together to provide the body's cells with nutrients?

These tiny blood vessels around the air sacs in your lungs are called.....?

What is the control center of your nervous system?

What gives information to the brain?

_________________ are the body's building blocks.

The _____________ is a baglike organ with walls of smooth muscle.

Which type of muscle make up the walls of the heart?

This system helps to support your body

The bundle of nerve tissue that runs through your backbone to your brain is called:

This muscle never stops working, even when you are asleep! It moves the blood around the body.

Where is digestion completed?

Bones support your body, give it shape, help you move, and protect your organs.

Tissues of different kinds that work together to perform a special job in the body are called?