
Small arteries
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Small artery
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Arteriole
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Endothelium of tunica intima
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

- Internal elastic lamina
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Tunica media
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Tunica adventitia
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Venule
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x

Peripheral nerve
Small arteries have three to eight layers of smooth muscle in the tunica media and an internal elastic lamina is generally present. The smallest arteries, like the one shown on the right, lead into arterioles, which are the main regulators of blood pressure. 700x, 1000x