Mesenteric Arteriole: The mesenteric arteriole comes from the mesenteric arteries that take oxygenated blood from the aorta and distribute it to a large portion of the gastrointestinal tract (GIT). This distribution is made possible by the capillaries connected to the mesenteric arteriole. Arterioles have endothelial cells and one or two layers of smooth muscle cells (dark purple area).

Elastic Artery: This transverse section through an elastic artery shows a thick media made largely by many well-developed elastic lamellae. Strong blood pressure pulsating into these arteries during systole expands the arterial wall, reducing the pressure, and allowing strong blood flow to continue during diastole. Common in elastic arteries are elastic connective tissues that act to smooth-out blood flow and divert blood flow from inactive tissues to active tissues.

REFERENCE:
Mescher, A. (2018). Junqueira’s basic histology: text and atlas (15th ed.). Mcgraw Hill Education.