ACING BIOS 255 EXAM 2 WITH AN A+ QUESTIONS AND
ANSWERS PLAYBOOK
Characteristics of Elastic arteries (Conducting arteries)
-largest arteries by diameter
-contain more elastic fibers than smooth muscle
-conduct blood from the heart to the more distant muscular arteries
-pressure reservoirs
Muscular arteries (distributing arteries)
-Distribute blood to various parts of the body
-Contain large amounts of smooth muscle, most named arteries in the body fall into this
category
Characteristics of Arterioles
-smallest arteries by diameter
-deliver blood to the capillaries, where gas and nutrient exchange can occur
-Control amount of blood to various organs
Characteristics of Venules
-smallest veins
-collect blood from the capillaries
-contain venous valves which prevent the backward flow of blood
-attached to capillary bed
Characteristics of Veins
-contain valves
-Carry blood back to heart
-hold the most blood(blood reservoirs)
-rely on the following to return blood to the heart: vasoconstriction, valves, skeletal
muscle pump, respiratory pump, and cardiac suction
-thinner tunica interna and media; thicker externa
lymphatic system functions
-Immunity
-Lymph formation
, -Fluid balance
-Transport lipids
List the organs of the lymphatic system
Lymphatic organs - Non-moving structures that work to house lymphatic tissue
Primary:
-Red bone marrow
-Thymus
Secondary:
-Lymph nodes
-Tonsils
-Spleen
Describe Red bone marrow
-involved in hematopoiesis (blood formation) and immunity
-Soft, loosely organized, highly vascular material
-B-cell maturation
Describe the Lymph nodes
-most numerous lymphatic organs
-removes unwanted waste
-acts as a site of B-cells and T-cells activation
Describe the Tonsils
-found in pharynx
-helps to trap inhaled or ingested foreign substances
-Pharyngeal tonsils
-Palatine tonsils
-Lingual tonsils
Describe the Thymus
-superior to the mediastinum between the two lungs, deep to the sternum
-site of T-cell maturation and growth
-shrinks as we age and is replaced with adipose tissue
-produces hormones that help to mature the T-cell Lymphocytes
Describe the Spleen
ANSWERS PLAYBOOK
Characteristics of Elastic arteries (Conducting arteries)
-largest arteries by diameter
-contain more elastic fibers than smooth muscle
-conduct blood from the heart to the more distant muscular arteries
-pressure reservoirs
Muscular arteries (distributing arteries)
-Distribute blood to various parts of the body
-Contain large amounts of smooth muscle, most named arteries in the body fall into this
category
Characteristics of Arterioles
-smallest arteries by diameter
-deliver blood to the capillaries, where gas and nutrient exchange can occur
-Control amount of blood to various organs
Characteristics of Venules
-smallest veins
-collect blood from the capillaries
-contain venous valves which prevent the backward flow of blood
-attached to capillary bed
Characteristics of Veins
-contain valves
-Carry blood back to heart
-hold the most blood(blood reservoirs)
-rely on the following to return blood to the heart: vasoconstriction, valves, skeletal
muscle pump, respiratory pump, and cardiac suction
-thinner tunica interna and media; thicker externa
lymphatic system functions
-Immunity
-Lymph formation
, -Fluid balance
-Transport lipids
List the organs of the lymphatic system
Lymphatic organs - Non-moving structures that work to house lymphatic tissue
Primary:
-Red bone marrow
-Thymus
Secondary:
-Lymph nodes
-Tonsils
-Spleen
Describe Red bone marrow
-involved in hematopoiesis (blood formation) and immunity
-Soft, loosely organized, highly vascular material
-B-cell maturation
Describe the Lymph nodes
-most numerous lymphatic organs
-removes unwanted waste
-acts as a site of B-cells and T-cells activation
Describe the Tonsils
-found in pharynx
-helps to trap inhaled or ingested foreign substances
-Pharyngeal tonsils
-Palatine tonsils
-Lingual tonsils
Describe the Thymus
-superior to the mediastinum between the two lungs, deep to the sternum
-site of T-cell maturation and growth
-shrinks as we age and is replaced with adipose tissue
-produces hormones that help to mature the T-cell Lymphocytes
Describe the Spleen
