lec6 Flashcards
Venous system consists of
A. coronary circulation: coronary sinus
B. pulmonary circulation: pulmonary veins
C. hepatic portal circulation
D. Systemic circulation
Veins are
superficial (unlike arteries)
Venous plexuses
networks of anastomoses and parallel veins) are very common
networks between superficial and deep veins and even between superficial veins themselve
Systemic circulation
veins carry the deoxygenated blood from different parts of the body to the heart
pulmonary circulation: pulmonary veins
these veins carry oxygenated blood from the lungs to the left atrium
coronary circulation: coronary sinus
the wall of the heart receives blood from the coronary arteries that arises from the ascending Aorta, then blood returns directly to the right atrium by the coronary sinus
hepatic portal circulation
blood carries carbohydrates, toxins, nutrients, viruses, etc from the intestines and then moves through the portal vein to the liver (by capillaries) to filter it, then the blood moves through capillaries to hepatic veins to end eventually in the inferior vena cava then right atrium
drain the venous blood of the brain
Cranial sinuses (inside the skull)
An important sinus is
the Cavernous sinuses
the Cavernous sinuses include
the Internal carotid artery and some cranial nerves (ophthalmic)
sinus that is dangerous if thrombosed
a fatal condition
Cavernous sinuses
sigmoid sinus
All venous sinuses come together forming it
sigmoid sinus exits the skull through
the jugular foramen forming the Internal Jugular vein
sinuses inside the skull
- superior sagittal sinus
- inferior sagittal sinus
- -transverse sinus
- cavernous sinus
superior sagittal sinus passes
between the two lobes of the brain
carotid sheath surround
the internal jugular vein+ common carotid artery+ vagus nerve
cavernous sinus location
at the top of the carotid canal
Venous drainage of the brain
Internal jugular vein
Internal jugular vein Runs
lateral to internal carotid then common carotid arteries in the carotid sheath.
Internal jugular vein joins
subclavian v.
brachiocephalic v. formed from
Internal jugular vein +subclavian v.
At base of neck
Internal jugular vein joins subclavian v. to form brachiocephalic v.
External jugular vein – drains
some of the scalp & face.
External jugular vein is formed by the junction of
the posterior division of the retromandibular vein with the posterior auricular vein.
External jugular vein ends in
the subclavian vein
the left brachiocephalic vein passes
behind the manubrium
the left brachiocephalic vein unites with
the right brachiocephalic vein
the left brachiocephalic vein with the right brachiocephalic vein at
the left brachiocephalic vein with the right brachiocephalic vein
superior vena cava is Formed by the junction id
the left brachiocephalic vein with the right brachiocephalic vein
a neonate has a congenital abnormality, or he can’t eat or drink anything, so the
doctor should give him fluids
in the external jugular vein
Venous drainage of the chest cavity
The azygos vein
Hemiazygos
accessory hemiazygos veins
Hemiazygos and accessory hemiazygos veins
drain the left side of the chest.
Hemiazygos and accessory hemiazygos veins drain into
the azygos vein.
The azygos vein transports deoxygenated blood from
the posterior walls of the thorax and abdomen into the superior vena cava vein
The azygos vein formed by
the union of the ascending lumbar veins with the right subcostal vein at the level of the 12th thoracic vertebra
The azygos vein drains
the right side of the chest
The azygos vein joins
the superior vena cava.
The azygos vein كيف بوصل لSVC
Ascending in the posterior mediastinum and arching over the right main bronchus posteriorly at the root of the right lung
1st 2nd 3rd 4th Lt intercostal veins drain directly to
the Lt brachiocephalic
Veins of the Palm
Superficial palmar venous Arch
Deep palmar venous Arch
dorsal venous arch.
the network of veins in the back of the hand
superficial veins passes through
the subcutaneous fats.
The deep vein passes
between muscles under the deep fascia
Superficial Veins of the upper limb are located within
the subcutaneous tissue of the upper limb.
Superficial Veins of the upper limb are the
Cephalic, Basilic and Median Vein of the Forearm.
Cephalic vein arises from
lateral side of the dorsal venous arch on the back of hand
Superficial Veins of the upper limb round
lateral border of forearm
Superficial Veins of the upper limb ascends
superficial fascia into the cubital fossa and up the front of the arm on the lateral side of Biceps
Blood can be taken from and put fluids or nutrients through
the median cubital vein
vein that is formed at the lower border of teres major muscle.
Axillary vein
Cephalic vein joins the Axillary vein at
On reaching the interval between deltoid & Pectoralis major muscles, it pierces the deep fascia & joins the Axillary vein.
Cephalic vein Drains
the lateral and posterior surfaces of the limb.
branch of Cephalic vein
Median Cubital Vein
Median Cubital Vein joins the
at
Basilic vein in the cubital fossa
Basilic vein arises from
the medial side of the dorsal venous arch on the back of hand
Basilic vein winds round
the medial border of forearm
Basilic vein ascends on
the medial side of Biceps
Basilic vein pierces
deep fascia at the middle of the arm
Basilic vein joins
the vena comitantes of the brachial artery
(brachial veins) to form the Axillary vein.
Axillary vein is formed by junction of
Basilic vein joins the vena comitantes of the brachial artery (brachial veins)
Basilic vein Drains
the medial and posterior surfaces of the limb
Basilic vein Receives
Median Cubital Vein at cubital fossa.
Median Vein of the Forearm arises
the palm
Median Vein of the Forearm ascends
on the front of forearm
Median Vein of the Forearm Drains into
into Basilic vein or Median cubital vein or
divides into two branches:
• Median Basilic vein:(Drain into basilic vein)
• Median cephalic vein:(Drain into cephalic vein)
