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(2)10/16/2026, 5:42:03 AM*&!#%#&&!%%#^#^
A&P II Lab 4 Notes
Mapping Range: Arteries capillaries veins back to heart
Atherosclerosis- plaque build up in the arteries
Aneurysm- weakened or ballooning in an artery (can rupture with each beat of the
heart)
Distributing arteries- distribute blood to specific regions/muscles of the body; thick
muscular wall up to 40 layers of smooth muscles. Makes up 75% of arterial wall itself.
Ex- brachioartery, Femoral artery.
Resting person:
11% of blood is found in systemic arteries
54% of systemic blood is found in the veins
Mapping Range for Veins:
post capillary vein post capillary venules muscular venules medium veins (blood
drained from specific organ) (contain valves in folds of tissues, point upwards toward
the heart) large veins heart
Varicose veins- blood pools into the backflow of the system
Coronary Sinus of the heart- blood that flows through the heart will dump into this
sinus before dumping into vena cava
Large Veins- inferior/superior vena cava that bring blood back to heart
Arteries (efferent blood vessel)
Function: Carry oxygenated blood away from the heart to various parts of the body.
Location: Throughout the body, originating from the heart and branching into
smaller vessels.
Veins (afferent blood vessels)
Function: Return deoxygenated blood back to the heart (exception: pulmonary
circuit), thin elastic walls that stretch easily
Location: Throughout the body, collecting blood from capillaries and converging
into larger veins.
Afferent Arteries
Function: Carry blood toward a specific organ or tissue.
Location: Various locations, depending on the organ or tissue being supplied.
Efferent Arteries
Function: Carry blood away from a specific organ or tissue.
Location: Various locations, depending on the organ or tissue being drained.
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5:42:03 AM*&!#%#&&!%%#^#^&^!#&*^&^*#!(FG*T!^&*#*((*!#&()#_)#!*&$!*#)(!*A_PII_Lab_4_Notes.docx
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Conducting Artery
Function: expands and stretch when the heart beats d/t elastic tissue to recoil
and relax
Location: the aorta and its major branches, such as the brachiocephalic artery,
common carotid arteries, subclavian arteries, and common iliac arteries, as well as the
pulmonary arteries
Capacitance Vessels
Function: Serve as reservoirs for blood, accommodating changes in blood volume.
Location: Primarily veins, especially large veins like the vena cava.
Superior/Inferior Vena Cava
Function: Return deoxygenated blood from the body to the right atrium of the heart.
Location: Superior vena cava is located above the heart, returning blood from the
upper body; inferior vena cava is located below the heart, returning blood from the
lower body.
Inferior Vena Cava
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Superior Vena Cava
Right Atrium
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(2)10/16/2026, 5:42:03 AM*&!#%#&&!%%#^#^
A&P II Lab 4 Notes
Mapping Range: Arteries capillaries veins back to heart
Atherosclerosis- plaque build up in the arteries
Aneurysm- weakened or ballooning in an artery (can rupture with each beat of the
heart)
Distributing arteries- distribute blood to specific regions/muscles of the body; thick
muscular wall up to 40 layers of smooth muscles. Makes up 75% of arterial wall itself.
Ex- brachioartery, Femoral artery.
Resting person:
11% of blood is found in systemic arteries
54% of systemic blood is found in the veins
Mapping Range for Veins:
post capillary vein post capillary venules muscular venules medium veins (blood
drained from specific organ) (contain valves in folds of tissues, point upwards toward
the heart) large veins heart
Varicose veins- blood pools into the backflow of the system
Coronary Sinus of the heart- blood that flows through the heart will dump into this
sinus before dumping into vena cava
Large Veins- inferior/superior vena cava that bring blood back to heart
Arteries (efferent blood vessel)
Function: Carry oxygenated blood away from the heart to various parts of the body.
Location: Throughout the body, originating from the heart and branching into
smaller vessels.
Veins (afferent blood vessels)
Function: Return deoxygenated blood back to the heart (exception: pulmonary
circuit), thin elastic walls that stretch easily
Location: Throughout the body, collecting blood from capillaries and converging
into larger veins.
Afferent Arteries
Function: Carry blood toward a specific organ or tissue.
Location: Various locations, depending on the organ or tissue being supplied.
Efferent Arteries
Function: Carry blood away from a specific organ or tissue.
Location: Various locations, depending on the organ or tissue being drained.
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Conducting Artery
Function: expands and stretch when the heart beats d/t elastic tissue to recoil
and relax
Location: the aorta and its major branches, such as the brachiocephalic artery,
common carotid arteries, subclavian arteries, and common iliac arteries, as well as the
pulmonary arteries
Capacitance Vessels
Function: Serve as reservoirs for blood, accommodating changes in blood volume.
Location: Primarily veins, especially large veins like the vena cava.
Superior/Inferior Vena Cava
Function: Return deoxygenated blood from the body to the right atrium of the heart.
Location: Superior vena cava is located above the heart, returning blood from the
upper body; inferior vena cava is located below the heart, returning blood from the
lower body.
Inferior Vena Cava
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Superior Vena Cava
Right Atrium
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