Week 2 Flashcards
Which organ in the digestive system does venous blood drain to first?
The liver
Which side of the heart pumps venous blood?
Right
Which side of the heart pumps arterial blood?
Left
What system is the thoracic duct in?
Lymphatic
What is the integumentary system?
The skin
What is the difference between systole and diastole?
Systole - Contraction
Diastole - Relaxation
Name the only vein that carries oxygenated blood.
Pulmonary vein
What is the main artery leaving the heart to the rest of the body?
Aorta
What is the main vein that brings blood back from the body?
Vena cava
What are the 3 layers of the heart wall?
Epicardium
Myocardium
Endocardium
What are the 2 atrioventricular valves and where is each located?
Mitral - Left
Tricuspid - Right
What valves other than the atrioventricular are found in the heart?
Semilunar
Describe conduction within the heart.
Signal starts at the sinoatrial node causing atria contraction
This travels to the AV node
This then travels down the bundles of His
This spreads to the myocardium via Perkinje fibres
What are the three layers of the blood vessel wall?
Tunica interna
Tunica media
Tunica adventitia
What is the tunica interna made of?
Endothelium
What is the tunica media made of?
Smooth muscle and elastic fibres
What is the tunica adventitia made of?
Connective tissue
What is the name of the area an artery supplies?
Territory
Describe sympathetic tone in arterioles.
There is a background low level of contraction in the smooth muscle due to tonic conduction of sympathetic nerve fibres.
What is an anastomoses and provide an example of where they can be found.
Alternative route through arterial connection around a potential blockage.
The circle of Willis, joints.
What is a negative of anastomoses?
Increased blood loss on injury.
What is an end artery?
The only artery supplying an area
What are the 4 parts to the aorta?
Ascending aorta
Arch of the aorta
Descending aorta
Abdominal aorta
What are the 3 branches of the arch of the aorta?
Brachiocephalic
Left common carotid
Left subclavian
Order these correctly
Radial and ulnar artery
Auxiliary artery
Subclavian artery
Brachial artery
Subclavian
Auxiliary
Brachial
Radial and ulnar
What does the abdominal aorta bifurcate to?
Common iliac arteries
What are the bifurcations of the common iliac artery?
External and internal iliac artery
Name 6 areas you can find a peripheral pulse in and the associated artery.
Carotid - Bifurcation of the common carotid artery
Brachial - Brachial artery
Radial - Radial artery
Femoral - Femoral artery
Posterior knee - Popliteal artery
Dorsum of the foot - Dorsalis pedis artery
Describe 3 mechanisms that assist venous blood flow.
Venous valves to prevent backflow
Muscular contraction
Venae comitantes - Run in pairs or more with an artery in sheath to pulsate venous blood.
What are the 2 sets of veins?
Superficial
Deep
What is the main vein of the GI tract?
Portal vein
What veins drains most organs and tissues?
Superior and inferior vena cava
What lines a capillary?
Single layer of endothelium
Where is most lymph returned to?
Veins in the root of the neck
What ducts drain lymph into the right venous angle?
The right lymphatic duct
What ducts drain lymph into the left venous angle?
The thoracic duct
What is the difference between intrinsic and extrinsic control?
Intrinsic control occurs within an organ.
Extrinsic control are initiated out with an organ and accomplished by the nervous and endocrine system.
What occurs in a feedforward control system?
A response is made in anticipation of a change.
What are the two types of feedback control systems?
Positive feedback: Amplifies an initial change.
Negative feedback: Opposes an initial change.
What is the primary feedback control system in the body?
Negative feedback control.