Circulatory & Respiratory Systems

What structure helps to prevent food from entering the sinus cavity during swallowing?

The uvula and/or epiglottis

The SA node is located in the

Right atrium

Blood leaving the right ventricle enters the

Pulmonary artery

The left lung is composed of how many lobes?

Two

The trachea divides into two branches called the

Bronchi

The wall separating the left side of the heart from the right side is the

the septum

Identify the waste gas removed from the blood during expiration.

Carbon dioxide

The cartilaginous rings which make up the trachea are

C-shaped

Which structures prevent heart valves from being forced backward into the wrong chamber?

Pulmonary Valve

Which structure holds the chordae tendineae to the interior walls of the heart?

Papillary muscles

The only type of vein in the body which carries oxygenated blood is

pulmonary veins

When blood leaves the right atrium, it enters the

Right ventricle

How many chambers are in the heart?

Four

The only type of artery in the body which carried deoxygenated blood is

A pulmonary artery

The pressure exerted by the left ventricle must push blood where?

To the body

Which chamber has the thickest muscular wall?

The left ventricle

The valve between the left atrium and left ventricle is known as the:

Bicuspid valve

The grooves in which the coronary arteries lie are known as which of the following?

Sulci

The right ventricle must exert enough pressure to push the blood where?

To the lungs and back to the Left Atrium

Heart attacks can result from a blockage of

A Coronary Artery

Which situation would most likely involve active expiration?

Running a marathon

The lung's lobed structure:

* Can be helpful when treating patients with lung cancer
* Allows removal of part of a lung
* Has a different number of lobes on each side

The right lung is composed of how many lobes?

Three

Which structure helps to prevent food from entering the trachea during swallowing?

The epiglottis

Expiration is…

Usually, passive