Anatomy Blood Vessel

Which is NOT a function of the circulatory system?

• deliver O₂ and nutrients to cells
• remove CO₂ and wastes from cells
• break down carbohydrates into glucose
• transport other materials through body

Which of the following substances are transported by the blood?

• All of the above
• O₂
• Glucose
• Urea

These carry blood away from the heart; mostly oxygen-rich

• Arteries
• Veins
• Capillaries

These carry blood toward the heart; mostly oxygen-poor

• Arteries
• Veins
• Capillaries

Structure(s) that keep the blood flowing in one direction.

• Valve(s)
• Septum(s)
• Neuron(s)
• Bronchiole(s)

Thin-walled vessels that allow for the exchange of O_{2 ,} CO₂, nutrients and wastes between blood cells or air sacs in the lungs

• Arteries
• Veins
• Capillaries

Which type of blood vessel uses valves to prevent a blood "backflow effect" that would create harmful stress on the heart?

• Arteries
• Veins
• Capillaries
• Valves

Along with valves, venous return of blood to the heart is assisted by

• skeletal muscle contractions
• smooth muscle contractions
• cardiac muscle contractions
• varicose veins

Which type of blood vessel has the thickest layer of smooth muscle in its walls?

• Arteries
• Veins
• Capillaries
• Ventricles

A weakness in an artery wall that balloons and fills with blood--and which can be treated by a medical professional--is called a(n)

• varicose vein
• stroke
• aneurism
• hemorrhage