Arteries

Question 1

Elastic arteries

Muscular arteries

Arterioles

Answer 1

• E.g. aorta, common carotid.
• Conducting arteries – withstand pressure change due to elastic fibres to maintain blood flow
• Thick tunica media, elastic fibres, less smooth muscle tissue.
• ^2.5 diameter.
• e.g. brachial, femoral and named arteries.
• Distributing arteries – blood to muscles/organs. Vasodilate/constrict.
• No elastic fibres, smooth muscle tissue in tunica media, distinct elastic layers (external and
  internal) , thick tunica externa.
• 0.5mm – 0.4cm.
• Resistance vessels – vasoconstriction/dilation.
• 1-2 layers of smooth muscle cells in tunica media, poorly defined tunica externa.