Lab 18 & 19- Blood Vessels I & 2 Flashcards
What type of tissue makes up the tunica media
Smooth muscle
- What type of tissue makes up the tunica intima?
* What is the unique name for this tissue location?
- Simple Squamous
* Endothelium: lining of blood vessels
What type of tissue makes up the tunica external (Adventia)?
Loose areolar connective tissue
Name the 3 layers of tunics
- Tunica intima
- Tunica media
- Tunica externa (adventia)
ELASTIC ARTERIES
•Which tunic is thickest in these arteries?
•In which tunics are the elastic fibers located?
•Name some elastic arteries.
- Tunica Media
- All three
- Pulmonary, aorta, common carotids
MUSCULAR ARTERIES
•Which tunic is thickest in these arteries?
•Where are the elastic fibers located?
•Name some muscular arteries.
- Tunica media
- Between the 3 layers (Internal & external elastic lamina)
- Femoral, renal, splenic, brachial
What are the internal and external elastic lamina?
What is significant about these two structures?
•This lamina lies between the Tunica intima and Tunica media. The external elastic lamina lies between the Tunica media and tunica externa. These contain elastic fibers.
ARTERIOLES
Can you see these in the cadaver?
what is the function of the tunica media in these vessels?
- No
* Determine which capillary bed receives blood
VEINS
•Is the tunica media of these vessels thicker or thinner than the arteries?
•What is the function of these vessels?
•What is the function of valves in these vessels?
- Thinner
- Stores blood (Capacitance) that is not in use.
- Prevent backflow of blood
Blood from the aorta came from which heart chamber?
Left ventricle
Name two arteries that come off of the aortic arch?
Rt & Lt Coronary artery
Name 3 branches that come off of the aortic arch.
Brachiocephalic, Left Common Carotid, and Left Subclavian.
Name some of the arteries that branch off of the descending (thoracic) aorta
Esophageal, bronchial, posterior intercostal
Which two veins merge to form the superior vena cava?
Left and right brachiocephalic veins
What does the inferior vena cava pierce just before it enters the right atrium?
The diaphragm
From which heart chamber does the pulmonary trunk emerge?
The right ventricle
To which organ are the right and left pulmonary arteries going?
The lungs (low oxygen)
There is only one brachiocephalic artery is that on the right or the left side?
Right
There are two brachiocephalic veins, each brachiocephalic vein is formed by the merging of what vein from the upper limb, and what vein from the head and neck region?
- Subclavian vein from the upper limb region
* An internal jugular vein from the head and neck region
What is a common clinical use of the common carotid artery?
Is this a paired or unpaired artery?
Checking for a pulse.
Paired
Where can the carotid sinus be found? What is the function of the carotid sinus?
- Found where the common carotid branches into the external and internal carotid arteries.
- measures blood pressure (baroceptor)
What areas are supplied by the external carotid artery?
Face and neck
What areas are supplied by the internal carotid artery?
The brain
Briefly describe the circle of Willis.
This is a system of interconnected arteries that circled the base of the brain. All of these are paired (one on each side) except the anterior communicating artery.
Is the basilar artery part of the circle of Willis? How is it formed?
No, it is not part of the circle of Willis it is formed by the two vertebral arteries at the junction of the pons and the medulla.
Name the arteries that are apart of the circle of Willis.
- Posterior cerebral arteries
- Posterior communicating arteries
- Internal carotid arteries
- Middle cerebral arteries
- Anterior cerebral arteries
- Anterior communicating artery
Posterior cerebral arteries
Branch off of the basilar artery (posteriorly)
Posterior communicating arteries
connect the posterior cerebral artery is posterior to the internal carotid artery is anteriorly