Cardiovascular System Review

The primary organ of the cardiovascular system is the _______.

• lung

• kidney

• heart

• stomach

A _____________ is a laboratory instrument used to spin blood so that it separates into layers of varying density.

• centrifuge

• hemocytometer

• electrocardiogram (ECG)

• x-ray machine

Centrifuged blood separates into three characteristic layers. Which of the following is NOT one of these layers?

• plasma

• hydrochloric acid

• red blood cells

• white blood cells and platelets

Blood cells are produced from ______ which are found in the red bone marrow. These cells are often transplanted from one individual to another in an effort to cure a blood cancer.

• stem cells

• yellow bone marrow

• periosteum

• teeth

Blood travels through our bodies in blood vessels. Which of the following blood vessel types is smallest?

• Arteries

• Capillaries

• Veins

Platelets facilitate blood clotting by activating _______, tiny thread-like fibers which create a strong mesh to trap red blood cells and prevent further blood loss from a site of injury.

• fibroid

• fibrin

• ventricles

• white blood cells

How many white blood cells are in this complete blood count sample?

• 0

• 7

• 25

• 22

Tags

NGSS.MS-LS1-3

Which of the following is/are TRUE of red blood cells? Check ALL that apply.

• They are also called "erythrocytes."

• They are responsible for delivering carbon monoxide throughout the body.

• They contain hemoglobin, a protein that is specialized for binding oxygen.

• Their primary job is to defend against infection.

• Their average lifespan is 120 days.

Which type of blood cell is attacking the foreign bacteria in this image?

• red blood cells

• platelet

• white blood cell

Tags

NGSS.MS-LS1-3

Too many __________, a condition known as polycythemia, leads to vascular sludging, which increases the risk of heart attack and stroke.

• white blood cells

• red blood cells

• platelets