Exam 4: Blood Vessels Flashcards
Blood vessels consist of
Arteries, veins, and capillaries
Carry blood away from the heart
Arteries
Carry blood towards the heart
Veins
The exchange of gases, nutrients, and waste products take place at the
Capillaries
Arteries and veins have three layers, what are they?
- Tunica intima
- Tunica media
- Tunica externa
The innermost layer of a blood vessel, composed of endothelium
Tunica intima
The middle layer of the blood vessel
Tunica media
Consists of circular layers of smooth muscle?
Tunica media
The outermost layer of a blood vessel composed of connective tissue for anchoring blood vessels to other structures
Tunica externa
What are the largest arteries
Elastic, or conducting
They have a large amount of elastic fibers throughout all three tunics
Elastic arteries
What layer of tunic has the most elastic fibers
Tunica media
Allow the arteries to stretch when blood is pumped through and then recoil
Elastic fibers
What are some examples of elastic arteries?
Aorta, pulmonary, brachicocephalic, common carotid, subclavian, etc.
Elastic arteries branch into
Muscular arteries
Medium sized arteries that distribute blood to organs and tissues
Muscular arteries
Elastic fibers are distributed in two layers….
Internal and external laminae which “sand which the muscular layer
Less elastic tissue in muscular arteries makes them
Less extensible, but allows for vasoconstriction and vasodilation
Muscular arteries branch into
Arterioles
Smallest of arteries
Arterioles
Larger arterioles have all three tunics, but the smallest arterioles have
Endothelium surrounded by a single layer of smooth muscle
Reduces blood flow into arterioles
Vasoconstriction
Increases blood flow into arterioles
Vasodilation
Smallest of blood vessels
Capillaries
Capillaries are located between the
Arterioles and venules
Slightly larger in diameter than an erythrocytes
Capillaries
Capillaries are composed of
Tunica intima
Allows for diffusion of gases snd nutrients
Capillaries
A capillary bed is fed by a…and drained by a….
Metarteriole; thoroughfare channel
The thoroughfare Chanel connects to a
Post capillary venue
Smallest of veins
Venues
Venules run with the
arterioles
Have a thin layer of smooth muscle, little ability to vasoconstrict
Venules
Merge to form large venules which merge to form
Veins
Small to medium veins run with
Muscular arteries
Large veins run with
Elastic arteries
Low pressure in veins necessitates valves to maintain
one way flow
What is the skeletal muscle pump
Skeletal muscle contraction and relaxation to help move venous blood
In the skeletal muscle pump…. The muscles
Squeeze the Veins, pushing venous blood towards the heart
Inactivity of the skeletal muscle pump results in
Reduced muscle pump and greater risk of clot formation
What doesn’t benefit from a skeletal muscle pump?
Inferior vena cava
Blood flow is assisted by…
Contraction and relaxation of the diaphragm
During inhalation, the diaphragm is
Depressed- results in increased abdominal pressure and decreased thoracic pressure
During inhalation blood is moved from
Abdominal part of the inferior vena cava to the thoracic part
During exhalation the diaphragm is
Elevated- resulting in decreased abdominal pressure and increased thoracic pressure
During exhalation of the diaphragm, blood is moved from the
Thoracic part of the inferior vena cava into the heart
The brachiocephalic artery divides into the
Right common carotid and right subclavian artery
Supply’s blood to head and neck
Common carotid arteries
What artery Supply’s blood to the upper extremities
Brachiocephalic arteries
Common carotid arteries branch into
Internal and external carotid arteries
The internal carotid arteries pass through the
Carotid channels (in floor of the skull), to help supply blood to brain
Supplies blood to the thyroid gland
Superior thyroid artery
Supplies blood to tongue
Lingual artery
Supplies blood to face
Facial artery
Supplies blood to the back of the head
Lesser occipital artery
Supplies blood behind the ear
Posterior auricular artery
Supplies blood to muscles of mastication and teeth
Maxillary artery
Supplies blood to scalp
Superficial temporal artery
Travel over the 1st rib and under clavicle to get to upper extremity
Subclavian arteries
Thyrocervical trunks help
Supply blood to thyroid gland and deep neck
Internal thoracic arteries descend along the
Sternum
Internal thoracic arteries give rise to
Anterior intercostal branches
The vertebral arteries travel up the neck through the…
Transverse foramina of cervical vertebrae before passing through foramen magnum
Internal carotid arteries ascend through
Carotid canals to the base of the brain
Each internal carotid artery branches into a
Middle and anterior cerebral artery
The anterior cerebral arteries connect through
Anterior communicating artery
After the vertebral arteries pass through the foramen magnum, they
Unite for form basilar artery
Provides branches to brainstem and cerebellum, and then splits into left snd right posterior cerebral arteries
Basilar arteries
The posterior cerebral arteries connect to the
Internal carotid arteries through posterior communicating branches
An arterial circle formed by posterior and anterior cerebral, posterior and anterior communicating, and internal carotid arteries
Circle of willis
To become the axillary artery,
subclavian passes the 1st rib
Supplies blood to the shoulder and lateral thorax
Axillary artery
The axillary artery passes the
Teres major and enters arm to become the brachial artery
The brachial artery descend in the
Arm medial to the biceps brachii muscle
Artery common used to check blood pressure
Brachial
At the anterior elbow, the brachial artery divides into the
Radial snd ulnar arteries
The radial and ulnar arteries supply the…
Forearm and wrist before joining the palm to form palmar arch
The thoracic aorta descends into the
Posterior thorax, slightly left of midline
The thoracic aorta gives off
Posterior intercostal branches
The thoracic aorta passes through what to become the abdominal aorta
Diaphragm
The abdominal aorta descends into the
Posterior abdomen, giving of paired and unpaired branches
The celiac artery is an _ branch that provides blood to the
Unbranched; stomach, duodenum, liver, gallbladder, spleen, and pancreas
The superior mesenteric artery is an _ a branch that supplies the
Unpaired; jejunum, ileum, ascending colon and transverse colon
The inferior mesenteric artery is an _ branch that supplies the
Unpaired; descending colon, sigmoid colon, and upper rectum
The renal arteries are _ branches that supply the
Paired, kidneys
The gonadal arteries are _ branches that supply the
Paired, Gonads
At what level does the abdominal aorta divide into the right and left common iliac arteries
L5
An abdominal aortic aneurysm repair involves placing a
Graft in place of the defective part of artery
The common iliac arteries enter the
Pelvis and branch into internal and external iliac arteries
The internal iliac arteries supply blood to the
Pelvic organs, gluteal region, and external genitalia
The external iliac arteries provide an
Inferior epicanthic artery
Supplies muscles or the anterior thigh and provides a deep branch to posterior thigh
Femoral artery
The femoral artery passes through what to become the popliteal artery
Adductor hiatus, popliteal fossa
In the superior aspect of the posterior leg, the pop literal artery gives rise to the
Anterior and posterior tibial artery, and fibular artery
The anterior tibial artery supplies blood to the muscles of the anterior compartment of the
Leg
The posterior tibial artery supplies blood to the muscles of the posterior compartment of the
Leg and plantar foot
The fibular artery supplies blood to the
Lateral compartment of leg
What artery is often used to access the heart
Femoral artery
Two brachiocephalic veins join to form the
Superior vena cava
Each brachiocephalic vein receives
Deoxygenated blood from head and upper extremities by internal jugular and subclavian vein
Located deep to the sternocleomastoid muscle
Internal jugular vein
Receives most of the blood from the brain, orbit, face, tongue, and thyroid gland
Internal jugular vein
Located superficial to sternocleomastoid
External jugular vein
Helps to remove blood from neck and tissue
External jugular vein
The subclavian vein travels with the
Subclavian artery behind clavicle
Axillary vein receives blood from the
Shoulder, lateral thoracic wall, and upper extremity
Deeps veins of the upper extremities are paired with
Radial and ulnar veins that run with their arteries
The radial and ulnar veins drain blood from the
Forearm and hand
The radial and ulnar veins empty into
Paired brachial veins
The brachial veins which drain blood from the ___; empty into the
Arm; axillary vein
Superficial veins of the upper extremities are also called
Cutaneous veins
The cephalon vein runs along the ___ ; and empties into the
Lateral forearm, subclavian vein
The basilic veins run along the ___ ; and drains into the
Medial forearm and arm, axillary vein
The median cubital vein runs between the
Cephalon and basilic veins
The median cubital vein is a common site for
Veni puncture
Located in the right side of the posterior thorax, receives blood directly from the intercostal veins on right and indirectly from the intercostal veins on left
Azygous vein
The intercostal veins on the left empty into either the
Hemiazygos or accessory hemiazygos vein
The hemiazygos or accessory hemiazygos vein crosses
Right to empty into azygos
The inferior vena cava receives blood from the
Liver, kidneys, gonads, pelvic organs, external genitalia, and lower extremities
The inferior vena cava doesn’t drain blood directly from the
Digestive tract
What veins drain blood into the inferior vena cava
Renal veins
The right gonadal vein drains directly into the inferior vena cava but the left renal vein drains into the
Left renal vein
The inferior vena cava divides into
Right and left common iliac veins
External iliac veins receive blood from the
Lower extremity via femoral vein
The internal iliac vein receives blood from the
Pelvic organs, external genitalia, and gluteal muscles
The posterior tibial veins drain blood from the
Door and posterior compartment of leg
The anterior tibial veins drain blood from the
Anterior compartment of leg
The fibular veins drain blood from
Lateral compartment of leg
The anterior and posterior tibial and the fibular veins drain into the
Popliteal vein at posterior knee
The popliteal vein passes from posterior to anterior through
Abductor hiatus to the anterior thigh as the femoral vein
The femoral vein collects blood from the
Anterior thigh and from posterior thigh through deep femoral vein
Once the femoral vein passes into the pelvis, it changes name to
External iliac vein
The great saphenous vein travels along the
Medial leg and thigh
The great saphenous vein collects most of superficial blood of the ___ and drains into the ___
Lower extremity, femoral vein in upper thigh
The small saphenous vein courses along the
Posterior leg
The small saphenous vein helps collect superficial blood of the __ and empties into the ___
Leg, popliteal vein
Dilated superficial veins due to faulty valves
Varicose veins
The hepatic portal vein receives blood from the
Digestive tract and accessory digestive organs; superior and inferior mesecenic veins, splenic veins
What vein is associated with blood filtration by liver
Hepatic portal vein
The blood collected by the hepatic portal vein contains
Nutrients for body and harmful agents that need to be filtered
The hepatic portal vein enters the liver snd branches into a
Network of small vessels for filtration
Once blood is filtered by the liver, it’s sent to hepatic veins for
Drainage into inferior vena cava
Structures that empty directly into inferior vena cava
Caval venous drainage
Structures that empty into the hepatic portal vein are said to have
Portal venous drainage
Simple squamous epithelium and thin layer of CT
Endothelium
What divides into diaphragm and upper abdominal wall arteries
Internal thoracic veins
The external iliac arteries leave the
pelvis and enter the upper thigh as femoral arteries
Compartment syndrome involves
Deep fibular nerve and anterior tibial artery