cardiovascular system Flashcards
(20 cards)
how many layers are within arteries and veins?
3
name the three 3 layers that make up arteries and veins
- tunica externa
- tunica media (varies in thickness)
- tunica interna
what allows ions to pass through the muscle cells within the heart?
intercalated discs and the atrioventricular (AV) node
how does the AV node allow ions to pass through the heart/
spreads the ions through the bundle of his and purkinjie fibres
how is back flow of blood prevented?
valves (tricuspid, mitral and semilunar) and chordae tendineae
what is the function of the chordae tendineae?
help anchor valves and stop them from flipping the wrong way
what is the heart’s natural pacemaker called?
the sinoatrial (SA) node
how does the SA node work?
generates electrical signals that
causes the atria to contract
what do arteries split into?
arterioles
what do veins split into?
venules
what are in between arterioles and venules?
capillaries
where does the coronary artery take blood?
the heart muscle
where do the internal cortoid and basilar deliver blood to?
the brain
where does the axillary artery deliver blood to?
thoracic limb
where does the external iliac artery deliver blood to?
pelvic limb
what parts of the body does the celiac artery deliver blood to?
the stomach, spleen, and liver
where does the cranial mesenteric artery deliver blood to?
small intestines and cranial large intestines
where does the caudal mesenteric artery deliver blood to?
caudal large intestines and rectum
do arteries have a high or low blood pressure?
high
do veins have a high or low blood pressure?
low
