Ap2 chapter 19 cardiovascular

Blood vessels called ———-connect arterioles to venules.

Capillaries

Which blood vessels have an extremely thin wall and narrow vessel diameter that are optimal for the diffusion of gases and nutrients?

Capillaries

Capillaries function together by forming a__________

Capillary bed

Which type of capllaries use simple diffusion or plnocytosis to pass materials through the vessel walls?

Continuous capillaries

Which arteries are also called conducting arteries because they conduct blood away from the heart to the smaller muscular arteries?

Elastic arterles

Which type of artery has a large proportion of elastic fibers throughout all three tunics, especially the tunica media?

Elastic artery

Which arteries provide only one pathway through which blood can reach an organ?

End arteries

The__________elastic lamina In the walls of muscular arterles separates the tunica medla from the tunica extema.

External

True or false: Arterles contain valves to prevent the backflow of blood.

False

In the figure, a __________capillary is shown.

Fenestrated

Which type of capilaries have pores within each endothellal cell and a continuous basement membrane?

Fenestrated caplaries

Which are components of a capillary bed?

Metarteriole

Smaller and medium-sized veins typically travel with.——-

Muscular arteries

Which arteries are also known as distributing arteries because they distribute blood to the body organs and tissues?

Muscular arteries

Which arterles have a greater amount of smooth muscle in their walls to enable better vasoconstriction and vasodilation?

Muscular artery

In a ____________blood passes through two capillary beds before returning to the heart.

Portal vein

Relaxation of the _______________allows blood flow Into the true capllaries of a capillary bed.

Precapillary sphincter

The narrow diameter of capillaries means that erythrocytes must travel single file. This is termed___________

Rouleau

What type of capillary is shown in the figure?

Sinusoid

The large gaps and discontinuous or absent basement membrane of _________allow this type of caplary to transport larger materlals such as proteins or cells. .

Sinusoids

In a capillary bed, the distal part of the metarteriole, called the ____________connects to a postcapillary venule.

Throughfare channel

True or false: Blood transported to and from the spleen is an example of a simple blood flow pathway.

True

The walls of capillaries contain only the ___________Intima allowing for rapid gas and nutrient exchange between the blood and tissues.

Tunica

What layer of the blood vessel wall is composed of an endothelium and a subendothellal layer of areolar connective tissue?

Tunica intima

What layer of the blood vessel wall is composed of circularly arranged layers of smooth muscle cells?

Tunica media

The network of small arteries extending through the tunica externa of very large blood vessels is know as the

Vasa vasorum

The narrowing of the blood vessel lumen resulting from contraction of the smooth muscle of tunica media is known as

Vasoconstriction

Smooth muscle in the arterioles usually is at least slightly constricted. This slightly constricted state is called_________tone.

Vasomotor

Which class of blood vessel returns blood to the heart?

Veins

Which blood vessels become larger and merge as they move toward the heart? Click the answer you think Is right.

Velns

A___________anastomosis includes two or more veins draining the same body region.

Venous

The companion vessels to the arterioles are the

Venules

Two or more arteries converging to provide alternate blood supply routes to body tissues or organs are called.

anastomoses

The smallest type of arteries are the———

arterioles

In the body, ———blood vessels travel together and supply the same region.

companion

The aorta, pulmonary arteries, brachiocephalic arteries, and common illiac arteries are examples of_______

elastic arteries

Arteriole vasodilation____________blood flow into an area.

increases

The space within a vessel through which blood flows is the.

lumen

Most of the named arterles of the body, such as the brachlal, anterior tibial, coronary and inferior mesenteric arteries, that distribute blood to body organs and tissues are examples of_________.

muscular arteries

In a capillary bed, the thoroughfare channel connects to a___________

postcaplllary venule

The bulk of a capillary bed is formed by the____________.

true capillaries

The outermost layer of a blood vessel is known as the————

tunica externa

Where are sinusolds found within the body?

1.Bone marrow 2.Liver 3.Spleen

Which are muscular arteries?

1.Coronary artery 2.Inferior mesenteric artery 3.Brachial artery

Where are continuous capillaries found within the body?

1.Muscle 2.Skin

Which processes are involved in vasomotion?

1.Precapillary sphincters open when a tissue needs nutrients. 2.Precapillary sphincters close when a tissue's needs are met.

Which are types of capillaries?

1.Sinusoids 2.Continuous 3.Fenestrated

Where are fenestrated caplaries found within the body?

1.Small intestine 2.Kidney

Which characteristics describe the general structure of a vein?

1.Walls collapse when drained of blood 2.Wider lumen than companion artery 3.Thicker tunica externa

When a person is at rest, approximately how much blood is being held within the veins, the body's blood reservoirs?

55%

Match the letter on the left with the structure on the right. General vessels structure

A. Lumen, B. Valve, C. Tunica external, D. Capillary bed

Identify the layers of the blood vessels on the figure. Vessels structure

A. Tunica intima B. Tunica media C.Tunica externa

A(n) ___________supply the same body reglon. Is the site where two or more arterles (or two or more velns) converge to

Anastomosis

Which are major classes of blood vessels?

Arteries , capillaries, Veins

A(n) ______________or shunt, transports blood from an artery directly Into a vein, bypassing the capllary bed.

Arteriovenous anastomosis

Which are muscular arteries?

1. Inferior mesenteric artery 2. Brachial artery 3. Coronary artery