what statement is true of capillaries course hero

What is the function of capillaries?

Capillaries: These tiny blood vessels have thin walls. Oxygen and nutrients from the blood can move through the walls and get into organs and tissues. The capillaries also take waste products away from your tissues. Capillaries are where oxygen and nutrients are exchanged for carbon dioxide and waste.

Which of the following is the correct definition for veins?

A blood vessel that carries blood to the heart from tissues and organs in the body.

What blood vessels Always carry blood away from the heart?

The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart. Arteries begin with the aorta, the large artery leaving the heart. They carry oxygen-rich blood away from the heart to all of the body's tissues.

Which of these has more pressure arteries or veins?

Your arteries are thicker and stretchier to be able to handle the higher pressure of blood moving through them. Your veins are thinner and less stretchy. This structure helps veins move higher amounts of blood over a longer time than arteries.

What is the definition of a vein quizlet?

Vein. General term for blood vessel carrying deoxygenated blood back to the heart. Medial. Medical term meaning "toward the midline of the body"

Which of the following is the correct definition for the circulatory system?

The system that contains the heart and the blood vessels and moves blood throughout the body. This system helps tissues get enough oxygen and nutrients, and it helps them get rid of waste products.

What carries blood away from capillaries?

Veins carry blood toward the heart. After blood passes through the capillaries, it enters the smallest veins, called venules. From the venules, it flows into progressively larger and larger veins until it reaches the heart.

How many capillaries are in the human body?

10 billionThey, in turn, branch into a extremely large number of the smallest diameter vessels—the capillaries (with an estimated 10 billion in the average human body).

Do capillaries have valves?

Veins use valves to transport blood towards the heart, but capillaries don't have valves. Capillaries diffuse blood and nutrients between veins and arteries through their thin walls.

Do capillaries carry blood at high pressure?

It is returned to the heart by the veins. The capillaries connect the two types of blood vessel (arteries and veins). Molecules are exchanged between blood and cells across the capillary walls....The blood vessels.ArteriesVeinsCarry blood under high pressureCarry blood under low or negative pressure6 more rows

Do capillaries have the lowest blood pressure?

Blood pressure tends to be the greatest near the heart, and decreases as blood flows to the capillaries. The pressure is greatest at the aorta and gradually decreases as blood moves from the aorta to large arteries, smaller arteries, and capillaries.

Do capillaries have high or low pressure?

Structure of blood vesselsArteryCapillaryDirectionAway from the heartFrom arteries to veinsPressureHighLowSize of hole (lumen)SmallVery smallWall thicknessThickOne cell thick2 more rows

Which of the following is the correct definition for arteries?

A blood vessel that carries blood from the heart to tissues and organs in the body.

What forces blood through veins?

Blood primarily moves in the veins by the rhythmic movement of smooth muscle in the vessel wall and by the action of the skeletal muscle as the body moves. Because most veins must move blood against the pull of gravity, blood is prevented from flowing backward in the veins by one-way valves.

Which is the largest vein in the body?

vena cavaVeins are the blood vessels that carry blood to the heart and most of the veins carry deoxygenated blood except the pulmonary vein. The largest vein in the human body: The largest vein in the human body is the vena cava which consists of superior and inferior vena cava.

Which of the following is an inflammation of a vein?

Phlebitis Overview Phlebitis (fle-BYE-tis) means inflammation of a vein. Thrombophlebitis is due to one or more blood clots in a vein that cause inflammation.

Why do capillaries allow rapid exchange of substances between the blood and interstitial fluid?

Capillaries allow rapid exchange of substances between the blood and interstitial fluid because they are very thin walled lacking a tunica media and tunica externa.

Which is greater, BCOP or arterial end?

a.) BCOP is greater at the arterial end

Which type of arteries have smooth muscle and fewer elastic fibers than elastic arteries?

b.) Muscular arteries have smooth muscle and fewer elastic fibers than elastic arteries.

How do endothelial cells regulate blood flow?

Endothelial cells can regulate local blood flow by secreting chemicals that cause vasodilation and change blood vessel permeability.