
Venule
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x

Venule
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x

Arteriole
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x

Endothelium
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x

Tunica media
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x

Tunica adventitia
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x

Peripheral nerve
A venule and accompanying arteriole show the variation between their walls. The venule has a tunica intima and a thin tunica adventitia of connective tissue. The arteriole has a tunica intima, a single layer of smooth muscle forming tunica media, and a thin tunica adventitia. The lumen of the arteriole was artifactually expanded during fixation by vascular perfusion. 1000x