Human Body Systems 1

____________ muscles are voluntary muscles that work in pairs (one gets shorter, while the other gets longer) to help you move your body.

• Smooth

• Skeletal

• Cardiac

The chambers that are responsible for pumping blood OUT of your heart are called ___________.

• Valves

• Ventricles

• Atria (just 1 = atrium)

• Veins

A __________ is the space in your skeleton where 2 bones connect

• joint

• tissue

• ligament

• cartilage

A(n) __________ is a structure made out of at least 2 kinds of tissue that work together to do a particular job.

• organ system

• organism

• cell

• organ

___________ muscle is the involuntary muscle that makes up your heart and never rests during your entire lifetime

• smooth

• skeletal

• cardiac

A(n) ___________ is an extremely thin blood vessel where oxygen and carbon dioxide are exchanged in the blood.

• artery

• vein

• capillary

• valve

A(n) __________ is a group of similar cells that works together to do a particular job.

• organ

• tissue

• organ system

• organism

The chambers where oxygenated and oxygen-poor blood ENTER your heart are called ___________.

• valves

• ventricles

• atria (just 1 = atrium)

• veins

A(n) _____________ is strong tissue that connects and stabilizes 2 bones at a joint.

• tendon

• ligament

• cartilage

• skeleton

__________ muscles are responsible for the movement involved in vital things in your body like digestion, breathing, and making blood flow through your blood vessels.

• smooth

• skeletal

• cardiac