7th Science ch. 9 lesson 1

The levels of organization in the human body consist of ______.

• cells

• tissue

• organs

• organ systems

The smallest unit of organization is the _______.

• cell

• organ system

• tissue

• muscle

The largest unit of organization is the ______ in an organism.

• cell

• organ system

• tissue

• muscle

The human body contains about ______.

• 100 trillion cells

• 1 trillion cells

• 100 million cells

• 3 trillion cells

_____ carry out the processes that keep organisms alive.

• Cells

• Muscles

• Bones

• Tissues

How many basic types of tissue does your body contain?

• 4

• 2

• 1

• 5

Which are the basic types of tissue in your body?

• connective tissue

• epithelial tissue

• nervous tissue

• muscle tissue

• blood tissue

______ carries out body movement.

• connective tissue

• epithelial tissue

• nervous tissue

• muscle tissue

______ carries electrical messages back and forth between the brain and other parts of the body.

• connective tissue

• epithelial tissue

• nervous tissue

• muscle tissue

_____ provides support for your body and connects all its parts.

• connective tissue

• epithelial tissue

• nervous tissue

• muscle tissue