BIOS255 Week 3 Cardiovascular System: Blood Vessels
Learning objectives:
Identify the structural layers of arteries and veins.
Distinguish between the structure of arteries and veins.
Explain the factors that affect arterial blood flow and blood pressure.
Define shock, and identify the signs of shock.
Identify key blood vessels of the cardiac, systemic, and pulmonary circulations.
Introduction:
Blood is transported around the body in 3 different types of blood vessels: arteries, capillaries,
and veins. Arteries and veins are each composed of 3 distinct layers of tissue while capillaries
only have one layer. Blood pressure and flow depend on multiple factors. There are a number of
mechanisms by which shock can occur.
We will track blood through the pulmonary and systemic circulations noting the major arteries
and veins along the path. Enjoy the interactive 3D models for exploring the blood vessels!
Assignment:
Part 1 Complete the activities in the following sections of Anatomy.TV Cardiovascular
system: Blood vessels, Blood flow and Pressure, Circulatory Pathways, Vessels of the Trunk,
Vessels of the Head and Neck, Vessels of the Limbs
To access Anatomy.TV: Resources tab>Library>Library Resources-Database A-
Z>Anatomy.TV>Titles(default tab): Choose Cardiovascular system>choose assigned sections
You will then work through the material and activities by scrolling down on the right. This will
allow you to see and work through all activities for that section.
As you complete the lab activities, have the lab report ready to record data.
Part 2 Complete the lab report.
, Blood vessel Lab report
1. Describe the different types of blood vessels by completing the following chart: (3
points total; 1/4 point per box)
Histological description/special
Blood vessel Function
characteristics
Are called elastic arteries or
conducting arteries. Has a thick tunica
media, a defined elastic laminae, and
full of elastic fibers that’s stretched Are used to move a
Large arteries easily when high blood pressure large amount of blood
occurs. from the heart.
Are called muscular artery or
distributing arteries. Have fewer elastic
fibers than the conducting arteries.
Does not deal with a lot of pressure
Ensures that there’s
compare to conducting arteries.
enough blood flow when
Medium arteries Contains smooth muscle cells,
vasoconstriction and
collagen fibers, and elastic fibers that
vasodilation occur.
enables cells to alter.
Also referred to as resistance vessels.
Has a thin tunica interna with an
internal elastic lamina that slowly Contains arteriole that
fades away as it reached to triggers vasoconstriction
metarteriole. Also has a tunica media and vasodilation, which
Arterioles
that contains smooth muscle cells that regulates blood flow,
forms a precapillary sphincter, which blood pressure and
controls the blood flow between the vascular resistance.
metarteriole and adjoining capillary.
Capillaries Lacks tunica media and tunica Exchange between
externa, but has capillary networks blood and interstitial
branching off that connects in the fluid, such as glucose,
vessels so blood flows smoothly oxygen and carbon
Learning objectives:
Identify the structural layers of arteries and veins.
Distinguish between the structure of arteries and veins.
Explain the factors that affect arterial blood flow and blood pressure.
Define shock, and identify the signs of shock.
Identify key blood vessels of the cardiac, systemic, and pulmonary circulations.
Introduction:
Blood is transported around the body in 3 different types of blood vessels: arteries, capillaries,
and veins. Arteries and veins are each composed of 3 distinct layers of tissue while capillaries
only have one layer. Blood pressure and flow depend on multiple factors. There are a number of
mechanisms by which shock can occur.
We will track blood through the pulmonary and systemic circulations noting the major arteries
and veins along the path. Enjoy the interactive 3D models for exploring the blood vessels!
Assignment:
Part 1 Complete the activities in the following sections of Anatomy.TV Cardiovascular
system: Blood vessels, Blood flow and Pressure, Circulatory Pathways, Vessels of the Trunk,
Vessels of the Head and Neck, Vessels of the Limbs
To access Anatomy.TV: Resources tab>Library>Library Resources-Database A-
Z>Anatomy.TV>Titles(default tab): Choose Cardiovascular system>choose assigned sections
You will then work through the material and activities by scrolling down on the right. This will
allow you to see and work through all activities for that section.
As you complete the lab activities, have the lab report ready to record data.
Part 2 Complete the lab report.
, Blood vessel Lab report
1. Describe the different types of blood vessels by completing the following chart: (3
points total; 1/4 point per box)
Histological description/special
Blood vessel Function
characteristics
Are called elastic arteries or
conducting arteries. Has a thick tunica
media, a defined elastic laminae, and
full of elastic fibers that’s stretched Are used to move a
Large arteries easily when high blood pressure large amount of blood
occurs. from the heart.
Are called muscular artery or
distributing arteries. Have fewer elastic
fibers than the conducting arteries.
Does not deal with a lot of pressure
Ensures that there’s
compare to conducting arteries.
enough blood flow when
Medium arteries Contains smooth muscle cells,
vasoconstriction and
collagen fibers, and elastic fibers that
vasodilation occur.
enables cells to alter.
Also referred to as resistance vessels.
Has a thin tunica interna with an
internal elastic lamina that slowly Contains arteriole that
fades away as it reached to triggers vasoconstriction
metarteriole. Also has a tunica media and vasodilation, which
Arterioles
that contains smooth muscle cells that regulates blood flow,
forms a precapillary sphincter, which blood pressure and
controls the blood flow between the vascular resistance.
metarteriole and adjoining capillary.
Capillaries Lacks tunica media and tunica Exchange between
externa, but has capillary networks blood and interstitial
branching off that connects in the fluid, such as glucose,
vessels so blood flows smoothly oxygen and carbon
