Circulatory system

Circulatory System Quiz

Test your knowledge of the circulatory system with this comprehensive quiz! Dive into various topics related to blood vessels, capillaries, and the heart's structure and function.

Explore different types of blood vessels
Understand the role of capillaries in circulation
Identify key components of the heart's conducting system

28 Questions7 MinutesCreated by FlowingAorta327

Characteristic(s) for fenestrated capillaries

Blood-brain barrier

Spleen

Bone marrow

Endocrine gland

True for elastic lamina

Modified cardiomyocyte

Present only in epicardium

Present in tunica media of large blood vessels

Present in tunica intima of large blood vessels

True for pericytes

Characteristic for large blood vessels only

Endodermal origin

No basal lamina

Have their own basal lamina

What is true for endothelium

Not present in wall of veins

Found in intima of artery

Found exclusively in capillaries

Produce endothelins

True for discontinous capillaries

Form blood-organ barrier

Form tissues-blood barrier

Endothelial cells form discontinous layer and are separated by wide space

Also called sinusoid

True about CS

The heart and blood vessels make up CS

Heart pumps blood and substances around body in blood vessels

Capillaries do not have tunica media

CS carries blood and dissolved substances to and from diffrent places in body

True for pericytes

Mesenchymal origin

Own basal lamina

Located outside elastic artery

Contain myosin, actin, tropomyosin and protein kinase which are related to contraction

True for endothelial cells

No wall in lymphatic vessels

Produce endothelins

Found in intima of artery

Endothelial cells are metabolic inactive

Capillaries

Connect arterioles with venules

Are sites of metabolic exchanges between blood and tissue

Continuous participate in formation of blood-brain-barrier

Sinusoidal have discontinuous basal lamina

Pericytes can be found in their wall

Are the smallest vessels in the bo

Muscular arteries:

The tunica media contains up to 40 layers of smooth muscle cells

Vasa vasorum are found in the tunica adventitia

External elastic lamina is present in the larger muscular arteries

The tunica media never contains elastic fibers

Veins:

Carry blood back to the heart from the organs

Small and medium sized veins have valves

Their lumen is usually collapsed

Large veins have a well developed tunica intima

Adventitia is the best developed layer

Large veins have relatively thin tunica media

Contain valves

Do not contain external elastic lamina

Purkinje fibers of heart:

Branches of atrioventricular node

Branches of bundle of His

Specialized to conduct nerve impulses

Modified cardiac muscle fiber

endocardium:

Is lined with endothelium

Smooth muscle cells and elastic fibres are its part

Subendocardium contains purkinje fibers

Is elongation of tunica intima of large vessels

Endothelial cell which modulate many aspects of normal hemostasis

Is the widest part of the heart – myometrium

Endothelial cells:

Line blood vessels

Mesenchymal origin

Contains desmin and vesmin → ability of contraction

Are always located on continuous basement membrane

Act as semipermeable barrier

Contain Weibel-Palade bodies

Secrete paracrine factors, collagen type 2,4 and 5, fibronectin

Elastic artery:

Elastic laminae are prominent in tunica media

Consists of vasa vasorum in tunica adventitia

No fibroblasts are present within tunica media

Its internal elastic lamina is the border between tunica intima and tunica media

Does not have tunica media

Include aorta and its branches

Contain smooth muscle in tunica media

Have elastic laminae in tunica intima and media

An internal elastic lamina is present

Find correct features of the vessels:

Tunica adventitia of vein is well developed

Pericyte are enclosed in its own basal lamina

Pericites have mesenchymal origin

Each type of blood vessels is lined with endothelium

Conducting system of heart:

Is located within subendocardial layer and myocardium

Is created by modified cardiac muscle cells

Consists of sinoatrial node

Contains Purkinje fibers

Atrioventricular node

Atrioventricular bundle (of His)

Continuous capillaries can be found in

Spleen – sinusoidal capillaries

Blood-brain barrier

Renal glomerulus – fenestrated capillaries

Liver – sinusoidal capillaries

Bone marrow – sinusoidal capillaries

Vasa vasorum (“vessels of the vessel”) can be found in:

Tunica adventitia of small capillaries

Tunica adventitia of large vessels

Tunica media of large vessels

Tunica intima of medium arteries

Internal elastic lamina

Fenestrated capillaries with diaphragms are located in:

Small intestine

Endocrine glands

Renal glomerulus

Pericytes:

Occurs in the capillaries and postcapillary venules

Contain myosin, actin, tropomyosin and protein kinase which are related to contraction

Form the continuous layer on the capillaries

Participate in repair process

Have mesenchymal origin

Have their own basal lamina

Choose sentence related to arterioles:

Are less than 0,5 mm in diameter

Media contain one or two layer of smooth muscle cells

Media contain numerous layers of smooth muscle cells

Tunica adventitia is the thickest tunica

External elastic lamina is prominent

Tunica intima:

Is always present in blood vessels

Is thicker in elastic arteries than in muscular ones

Endothelial cells lie on the basal lamina

Choose the correct sentence describing veins:

Tunica media is much more developed than that within arteries

Have not got any muscles within their wall

The adventitial layer very often contains longitudinal bundles of smooth muscle

Tunica media is less developed than that within arteries

Find true sentences on capillaries:

Sinusoids are found in a bone marrow

Continuous form a blood-brain barrier

Are the smallest blood vessels

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