CS and RS

What separates the atria from the ventricles

Valves, which are similar to a trap door.

What separates the atria from the ventricles?

Valves, which are similar to a trap door.

Why is the heart so important to survival?

It is pumping oxygen rich blood to the body cells

What gas exchange takes place in the lungs

Oxygen enters the blood and carbon dioxide leaves the blood

What gas exchange takes place in the capillaries throughout the body?

Oxygen leaves the blood and goes into the cells, while carbon dioxide diffuses into the bloodstream to be taken out of the body.

What is breathing?

Physical intake of air into the body; inhaling and exhaling

Name the largest artery in your body

aorta

What is the difference between an artery and a vein?

Arteries carry blood away from the heart, while veins carry blood to the heart. Arteries typically carry oxygenated blood (oxygen rich) and veins typically carry deoxygenated blood (oxygen poor).

Is blood traveling in the aorta deoxygenated or oxygenated?

oxygenated

Most arteries carry

oxygenated

Blood leaving the right side of the heart is headed where

to the lungs to get oxygen

What is respiration?

In cells: chemical reaction to release energy from food In organisms: gas exchange between organisms and the environment

Which chamber of the heart is the strongest and most muscular? Why

Left ventricle because it has to pump blood out of the heart and into the blood vessels, with enough force to get to the rest of the body.

Trace the path of air flow into your body, starting with mouth/nose and ending at the alveoli.

Mouth/Nose→Pharynx→Trachea→ Bronchi→ Bronchioles→ Alveoli→ Capillaries

What muscles controls the breathing process?

Diaphragm

What happens in the alveoli?

Gas exchange: oxygen in alveoli diffuses into the bloodstream while carbon dioxide in the bloodstream diffuses into alveoli to be exhaled

What is a capillary?

Smallest type of blood vessel, where the gas exchange is occurring

What causes the "lub-dub" sound of your heart

The opening and closing of the valves.

If blood is traveling through the aorta, where is it going?

This blood would be going to the rest of the body.

What is the main function of the respiratory system

To bring oxygen into the body, and to get rid of carbon dioxide.

What is the purpose of the epiglottis?

To prevent food or liquid going into trachea while breathing; it moves over both tubes (trachea/esophagus).

most veins carry

deoxygenated