Circulatory system
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Blood vessels<br />
2. หลอดเลือด vein<br />
Circulation in Human Body<br />
Valve (open)<br />
Direction of blood<br />
flow in vein<br />
กล้ามเนื อลาย<br />
(Skeletal muscle)<br />
Valve (closed)<br />
http://ib.bioninja.com.au/standard-level/topic-6-human-physiology/62-the-blood-<strong>system</strong>/veins.html<br />
26
Change language