______ are the “building blocks” and also the smallest part of the body.

• Cells
• Nerves

• Organs
• Tissues

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A group of cells working together are called ______.

• organs

• nerves

• systems

• tissues

Tags

NGSS.MS-LS1-3

The organs that work with parts of your body that help in a certain way are called ______.

• Nervous System

• Body Systems

• Tissues

• Muscles

Tags

NGSS.MS-LS1-3

​ (a)   keep dust and other objects out of your eyes.

• Eyelids
• Lens
• Pupils

The ​ (a)   is the body system that has the brain, the nerves, and the spinal cord in it.

• nervous system
• circulatory system
• respiratory system
• digestive system

The​ (a)   controls your entire body.

• brain
• heart
• spinal cord
• nerves

The ​ (a)   nerve carries a message of sight to your brain.

• optic
• auditory
• seeing

The ​ (a)   is the colored ring of muscles that control the size of the pupil.

• iris
• cornea
• lens
• retina

Answer explanation

The bundle of nerves protected by your backbone is called the ______.

• tissues

• nervous system
• spinal cord
• organs

Answer explanation

The cells that carry messages to and from the brain are called _______.

• bones

• organs

• tissues

• nerves