Module 1 Venous Anatomy Flashcards
What is the circulatory system?
A network of blood vessels that the transport nutrients, hormones, etc. to and from the heart
What is the circulatory system comprised of? 5
- Heart
- Arteries and arterials
- Veins and venues
- Capillaries
- Blood
The right side of the (pulmonary) circulation has what kind of flow? As a result how did the walls seem?
Little resistance to flow, so the walls of the right ventricle are thinner
The left side of the (pulmonary) circulation has what level of resistance? What does this do to the walls?
Greater Peripheral resistance so the left ventricular walls are more muscular
What is the pressure system of the arteries and arterials? And what is the volume?
- High pressure system
- Low volume
What is the pressure system of the veins and venues ? What is the volume?
- Low pressure system
- High volume
What do the capillaries do?
Exchange between blood and tissue
Veins are capacitance vessels that hold how much blood volume?
2/3 of blood volume
What are considered a low pressure blood reservoir and what does it do?
Veins, and they return blood to the heart
What are vena combatants?
Veins are often paired in the extremities and accompany an artery
What two things controls the resistance of flow in the arteriole side? And what does it help regulate?
- Muscular arterioles
- Precapillary sphincters
- The helps regulate the pressure in the arterial tree
Lymph capillaries coexist with what? And what does it do?
- Blood capillaries
- They exchange anything from liquid to cells. They “mop up” or absorb excessive fluid like with interstitial edema
Single celled capillary walls help do what?
Exchange nutrients and gasses
Average total blood in the adult body?
5L
Blood is formed of what?
- Erythrocyte (red blood cell)
- Leukocytes (white blood cells)
- Platelets
What is the vasa vasorum?
Network of tiny vessels that supply the walls of large veins and arteries with nutrients and oxygen
Veins have 3 layers what are they?
- Tunica Intima
- Tunica media
- Tunica adventitia
The number of valves increase as what?
Distance from the heart increases
Valves allow for what? Where are there more valves?
One way flow and present with greater numbers in the upper and lower extremities
Valves in the Intimal layer usually consist of how many leaflets?
Bicuspid
What is reflux blood?
Fills the pockets behind the leaflets causing them to close and stop the reversed flow
Where are valves in the veins usually found?
Where a tributary joins a larger vein and at intervals along main veins
What are three different types of veins/
- Deep
- Superficial
- Perforators
Deep veins are surrounded by what? They are usually accompanied by what? Calf veins are special how?
- Surrounded by muscles
- Have an accompanying artery
- Calf veins are duplicated
What does the internal iliac veins drain?
Pelvic viscera and muscles
What does the external iliac veins drain?
Leg
Where is the Common iliac vein seen at? What is it formed by?
The level of the sacroiliac joints and are formed by the confluence internal and external iliac veins
External iliac vein becomes the common femoral vein where?
Inguinal ligament
Pop vein is formed by the confluence of what? 3
- Anterior tibial veins
- Tibioperoneal trunk
- Perineal veins
What is the anterior tibial vein (ATV)? Where is it located? What does it join?
- Pedal vein in foot
- Between the tibia and fibula
- Joins the tibial trunk
Where is the Tibioperoneal trunk found? What two things does it consist of?
Found along medial calf and consists of the
1. Posterior tibial veins
2. Medial and lateral plantar veins
What are the Peroneal veins (Peroneal veins)? Where is it found?
- Lateral Calf
- Behind fibula
What are the Soleal sinuses?
Thick walled venous reservoirs within the soleal muscle
What does the Soleal Sinuses empty into?
Posterior tibial veins and peroneal veins
Soleal sinuses do not contain what? What does this lead to?
Venous valves and are a frequent site of thrombosis
Where are Lower extremity superficial veins located? 2
- Near the skin surface
- Superficial to muscle
What does the Lower extremity superficial veins help the body to do?
Helps regulate body temperature
Does the Lower extremity superficial veins have a corresponding artery?
No
What structures are included in the Lower extremity superficial veins? 2
- GSV
- SSV
What is the GSV?
Longest vein in the body (long saphenous)