Respiratory System
Parts of the Heart
Random
100

The primary organs used for gas exchange.

Lungs

100

The lower chambers of the heart.

Ventricles

100

In which circuit (pulmonary or systemic) does blood become oxygenated?

Pulmonary

200

What is the gas we breathe out (exhale)? Is it acidic or basic?

Carbon dioxide; acidic

200

The upper chambers of the heart.

Atria

200

Which component of blood protects the body from pathogens and viruses?

White blood cells

300

Tiny sacs that take in air; surface is site of gas exchange

Alveoli

300
Vessels that carry blood AWAY from the heart.

Arteries

300

Does exercise lower or raise tidal volume?

Raise

400

Three processes of respiration

Pulmonary ventilation, gas exchange, gas transport

400

Vessels that carry blood to the heart.

Veins

400

Which valve separates the left ventricle from the aorta?

Aortic valve (semilunar)

500

Branched structures in the lungs that look like tree branches.

Bronchioles

500

Largest vein is the...

Vena cava

500

What makes the 'lub-dub' sound in the heart?

The valves snapping shut during a heart contraction