circularity system anatomy Q3

fitted with gap junctions, endothelial cells r close to each other

exchange of water and small molecules (transport vesicles)

has pores covers with ultra thin diaphragm.

allow faster rapid molecular exchange between capillaries and tissues

permeability to larger molecules.

absence of basement membrane under endothelial cells, many large fenestrea (NO PORE)!

direct transportation from the capillary's lumen to surrounding tissue.

<p>1- elastic (conducting, largest)</p> <p>2- muscular (distributing)</p> Signup and view all the answers

<p>elastic (conducting) artery, has elastic tissue in tunica media as it accommodate high pulsatile forces. its main examples r Aorta, pulmonary trunk and its branches.</p> <p>muscular (distributing) artery, has the elastic fibre only at the intersection of the tunica intima and media , or media and externa ( doesn't have elastic fibber/tissue in tunica media as the elastic artery), instead, its tunica media is thick with smooth muscle to allow for (vasodilation and vasoconstriction) eg, major vessels arising from aorta (except major trunks and terminal branch od abdominal aorta-common iliac a).</p> Signup and view all the answers

<p>1-brachiocephalic artery 2-right/left subclavian artery 3- right/left common carotid artery</p> Signup and view all the answers

<p>in the posterior mediastinum, T12 (vert level) the aortic hiatus (opening of the diaphragm).</p> Signup and view all the answers

<p>thoracic aorta-above diaphragm. abdominal aorta-below diaphragm.</p> Signup and view all the answers

<p>the carotid sinus is located near bifurcation of the carotid artery, it has baroreceptors (bp).</p> <p>the carotid body is located (at the bifurcation of the carotid artery), has ch.receptors sensitive to (O2,H+CO2 levels).</p> Signup and view all the answers

<p>Aortic dissection</p> Signup and view all the answers