Tunica Externa Collection

Blood flow through a relaxed artery verus an artery in spasm

Arteries on heart showing atherosclerotic plaque in an artery

Interior view of heart with detail of muscle cells and atherosclerotic artery. Chest x-ray in background

Nerve ending, seen in lower right, sends pain message from injured muscle. Blood vessel and immune cells are seen in the center and upper right of image

Thrombus forming on valve within vein

Normal artery compared to plaque and thrombus formation in artery

Normal artery versus artery in spasm

Artery showing atherosclerotic plaque, platelets and red blood cells
Close-up of artery showing atherosclerotic plaque, platelets and red blood cells

Schematic of the hypothalamus receiving nerve impulses from the body and sending messages to the circulatory and nervous system

Arteriole with red blood cells, white blood cells and oxygen

Blood vessel anatomy

Nerve with myelin sheath, seen in lower right, connects with muscle. Blood vessel and immune cells are seen in the center and upper right of image

Components of blood vessel interact with intracellular fluid; white blood cells, red blood cells, oxygen, platelets and hormones

Blood vessels, light micrograph
Blood vessels. Light micrograph of a section through tissue showing an artery (bottom left) and a vein (top right). Two nerve fibres (dark blue) are also seen

Artery anatomy, artwork
Artery anatomy, computer artwork. At the centre of the artery is the lumen, with three red blood cells (erythrocytes, bottom right)

Artery, TEM
Artery. Coloured transmission electron micrograph (TEM) of a transverse section through an artery. Red blood cells (erythrocytes, red) and white blood cells (leucocytes)

Blood vessel structure, artwork
Blood vessel structure. Artwork showing the layers of tissue in the walls of a vein. In the lumen of the vein are valves (grey) that prevent the back flow of blood

Heart blood vessel wall, TEM

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"Tunica Externa: Unveiling the Intricacies of Blood Vessels" Blood flow through a relaxed artery versus an artery in spasm: Witness the contrasting dynamics as blood gracefully courses through a relaxed artery, while an artery in spasm constricts and impedes the vital flow. Arteries on heart showing atherosclerotic plaque in an artery: Delve into the intricate network of arteries within the heart, where we uncover the presence of atherosclerotic plaque, silently threatening cardiovascular health. Interior view of heart with detail of muscle cells and atherosclerotic artery: Peer inside the magnificent organ that is our heart, observing its awe-inspiring muscle cells alongside an unfortunate sight - an atherosclerotic artery battling against compromised blood circulation. Nerve ending, seen in lower right, sends pain message from injured muscle: In this captivating image capturing microscopic details, witness how even at such minuscule levels, nerve endings play their crucial role by transmitting pain signals from injured muscles to our consciousness. Thrombus forming on valve within vein: Astonishingly captured is the formation of a thrombus on one of our body's delicate valves within veins – reminding us that vigilance against clotting disorders is paramount for optimal health. Normal artery compared to plaque and thrombus formation in artery: Comparing side by side reveals stark disparities between normal arteries and those plagued by both arterial plaques and menacing thrombi – emphasizing why preventive measures are essential. Schematic of hypothalamus receiving nerve impulses from the body: Embark upon understanding how our remarkable hypothalamus receives intricate nerve impulses from throughout our body via this illuminating schematic representation. Arteriole with red blood cells, white blood cells, and oxygen: Marvel at this vibrant portrayal showcasing arterioles teeming with life - red blood cells, white blood cells, and oxygen.