A&P BIOL 2402 Lecture Exam: Chapter
20 - Blood Vessels Study Guide Exam
and Actual Answers (2025-2026)
Updated.
Blood Vessel Pathway - Answer -
Cardiovascular System - Answer is composed of the hear and blood vessels that pump blood
throughout the body
Blood Vessels - Answer include arteries, veins, and capillaries
Arteries - Answer -strong, elastic vessels that carry pressurized blood away from the heart
Veins - Answer -thinner vessels moving blood towards the heart
Capillaries - Answer exchange site
Artery Structure - Answer -wall made of tunics surrounding a lumen
1. Tunica Intima
2. Tunica Media
3. Tunica externa
Tunica Intima - Answer -smooth surface for blood flow
Tunica media - Answer -smooth muscle for contraction/relaxation
Tunica externa - Answer -helps anchor vessel to structure
Artery Characteristics - Answer -arteries have large tunica media layer
-thick muscular arteries can constrict, raising blood pressure
, -Veins contain valves to prevent backflow of blood
-Venous blood has low pressure (0-20 mm Hg)
-More elastic, less structural support so they flatten if emptied
Artery Types - Answer Largest to Smallest
1. Elastic (conducting)
2. Muscular (distributing)
3. Arterioles
-Composition decreases in size as they get farther from the heart
Elastic (conducting) - Answer - heart to muscular arteries
Muscular (distributing) - Answer -to a specific body region
Arterioles - Answer - regulate systemic blood pressure/flow
Aneurysm - Answer - thinning of the arterial walls, causing the vessels to balloon out
- pulsating blood cause reptures
- if it's large artery to can lead to massive bleeding and death
- often occurs in the aorta
Veins - Answer - merge into larger vessels with large lumens
- most have valves to prevent backflow & pooling
-Types, largest to smallest:
1. Large veins (vena cava)
2. Small to medium sized
3. Venules
Capillaries - Answer - connects arterioles to veins
- penetrate nearly all tissues
20 - Blood Vessels Study Guide Exam
and Actual Answers (2025-2026)
Updated.
Blood Vessel Pathway - Answer -
Cardiovascular System - Answer is composed of the hear and blood vessels that pump blood
throughout the body
Blood Vessels - Answer include arteries, veins, and capillaries
Arteries - Answer -strong, elastic vessels that carry pressurized blood away from the heart
Veins - Answer -thinner vessels moving blood towards the heart
Capillaries - Answer exchange site
Artery Structure - Answer -wall made of tunics surrounding a lumen
1. Tunica Intima
2. Tunica Media
3. Tunica externa
Tunica Intima - Answer -smooth surface for blood flow
Tunica media - Answer -smooth muscle for contraction/relaxation
Tunica externa - Answer -helps anchor vessel to structure
Artery Characteristics - Answer -arteries have large tunica media layer
-thick muscular arteries can constrict, raising blood pressure
, -Veins contain valves to prevent backflow of blood
-Venous blood has low pressure (0-20 mm Hg)
-More elastic, less structural support so they flatten if emptied
Artery Types - Answer Largest to Smallest
1. Elastic (conducting)
2. Muscular (distributing)
3. Arterioles
-Composition decreases in size as they get farther from the heart
Elastic (conducting) - Answer - heart to muscular arteries
Muscular (distributing) - Answer -to a specific body region
Arterioles - Answer - regulate systemic blood pressure/flow
Aneurysm - Answer - thinning of the arterial walls, causing the vessels to balloon out
- pulsating blood cause reptures
- if it's large artery to can lead to massive bleeding and death
- often occurs in the aorta
Veins - Answer - merge into larger vessels with large lumens
- most have valves to prevent backflow & pooling
-Types, largest to smallest:
1. Large veins (vena cava)
2. Small to medium sized
3. Venules
Capillaries - Answer - connects arterioles to veins
- penetrate nearly all tissues
