Capillaries, Veins and Coronary Circulation

capillary network

where nutrient/gas exchange occurs.

venule

small vessels that drain capillaries

small, medium and large veins

carry blood toward the heart size increases with proximity to the heart

superficial vein

visible under skin, regulate temperature

deep vein

travel with arteries and are important for drainage

venous sinuses

flatten veins with thin walls(example dural venous sinuses in the brain)

coronary sinus

drains heart muscle into right atrium

superior vena cava

drains upper body to right atrium

inferior vena cava

drains lower body to right atrium

internal jugular vein

exits cranium through jugular foramen

dural venous sinuses

drain brain into internal jugular

right and left brachiocpehlaic veins

formed by internal jugular and subclavian

internal jugular vein

drains brain

external jugular vein

drains face and scalp

vertebral veins

drain spinal cord

subclavian vein

major drainage vein

deep axillary vein

in the armpit

deep brachial veins

in upper arm

deep radial veins

forearm vein closest to the thumb

deep ulnar veins

forearm vein closest to pinky

superficial cephalic vein

lateral arm

superficial basilic vein

medial arm

right and left renal veins

drain kidneys

hepatic portal vein

main vein of system

superior and inferior mesenteric vein

drain intestines

splenic vein

drains spleen

gastric vein

drains stomach

right and left internal iliac vein

drains pelvic organs

right and left external iliac vein

becomes the femoral vein

femoral vein

found on the anterior side of the upper leg

popliteal vein

found posterior, behind the knee

anterior tibial veins

anterior lower leg vein

posterior tibial veins

posterior lower leg vein

great saphenous vein

longest vein in the body and is often used for grafts

coronary arteries

supply heart muscle, a blockage of this artery could lead to heart attack

great and small cardiac veins

drain into coronary sinus—→ right atrium

coronary sinus

the main vein collecting deoxygenated blood from the heart muscle and returning it to the right atrium

What are the causes and results of blocked coronary arteries and how they may be treated with angioplasty and bypass surgery?

the cause: plaque buildup

result: reduced oxygen—→ chest pain, heartattack

treament- angioplasty oy bypass surgery

valves

prevent backflow

angioplasty

balloon opens artery

bypass surgery

vein graft