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.
This study source was downloaded by 100000899984848 from CourseHero.com on 07-11-2025 01:45:34 GMT -05:00
https://www.coursehero.com/file/169797782/FINAL-LABS-BIOS255-Labs-BIOS-255-Week-3-Blood-Vessels-docx/
, 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
The aorta, connected to the heart’s left
ventricle Take blood away from
Large arteries
the heart
Carries blood from an
Muscular artery
elastic artery to
Medium arteries
resistance vessels like
small arteries
Small section of an artery that goes
into a capillary Blood is placed into
Arterioles
capillaries to
Branch between the arterioles and
Exchange area between
venules
Capillaries blood and tissue cells of
materials
1cm diameter, shaped like a flapped
cusp; can contain small extensions,
valves or infoldings of the tunica Prevent back flow of
Medium veins
interna into the lumen blood
Tunica externa is thick, no valves
found here
Drain blood from
Large veins
tributaries into the heart
2. When a fall in arterial pressure is detected by baroreceptors, how does the
cardiovascular center alter the parasympathetic and sympathetic stimulation of the
sinoatrial (SA) node to maintain homeostasis? (1 point)
When a fall occurs, the cardiovascular center decreases vagal parasympathetic stimulation to
the SA node, while simultaneously increasing sympathetic stimulation by cardiac accelerator
nerves.
This study source was downloaded by 100000899984848 from CourseHero.com on 07-11-2025 01:45:34 GMT -05:00
https://www.coursehero.com/file/169797782/FINAL-LABS-BIOS255-Labs-BIOS-255-Week-3-Blood-Vessels-docx/
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.
This study source was downloaded by 100000899984848 from CourseHero.com on 07-11-2025 01:45:34 GMT -05:00
https://www.coursehero.com/file/169797782/FINAL-LABS-BIOS255-Labs-BIOS-255-Week-3-Blood-Vessels-docx/
, 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
The aorta, connected to the heart’s left
ventricle Take blood away from
Large arteries
the heart
Carries blood from an
Muscular artery
elastic artery to
Medium arteries
resistance vessels like
small arteries
Small section of an artery that goes
into a capillary Blood is placed into
Arterioles
capillaries to
Branch between the arterioles and
Exchange area between
venules
Capillaries blood and tissue cells of
materials
1cm diameter, shaped like a flapped
cusp; can contain small extensions,
valves or infoldings of the tunica Prevent back flow of
Medium veins
interna into the lumen blood
Tunica externa is thick, no valves
found here
Drain blood from
Large veins
tributaries into the heart
2. When a fall in arterial pressure is detected by baroreceptors, how does the
cardiovascular center alter the parasympathetic and sympathetic stimulation of the
sinoatrial (SA) node to maintain homeostasis? (1 point)
When a fall occurs, the cardiovascular center decreases vagal parasympathetic stimulation to
the SA node, while simultaneously increasing sympathetic stimulation by cardiac accelerator
nerves.
This study source was downloaded by 100000899984848 from CourseHero.com on 07-11-2025 01:45:34 GMT -05:00
https://www.coursehero.com/file/169797782/FINAL-LABS-BIOS255-Labs-BIOS-255-Week-3-Blood-Vessels-docx/
