Interlobular arteries arise from the arcuate arteries and ascend into the cortex, where they divide into afferent arterioles that supply blood to the glomerular capillaries.
What is a interlobar artery?
The interlobar arteries are vessels of the renal circulation which supply the renal lobes. The interlobar arteries branch from the lobar arteries which branch from the segmental arteries, from the renal artery.
What is the function of the arcuate artery?
The arcuate arteries of the kidney, also known as arciform arteries, are vessels of the renal circulation. They are located at the border of the renal cortex and renal medulla.
|Arcuate arteries of the kidney|
|Branches||Vasa recta and interlobular arteries|
What is an interlobular vessel?
FMA. 70498. Anatomical terminology. Cortical radial arteries, formerly known as interlobular arteries, are renal blood vessels given off at right angles from the side of the arcuate arteries looking toward the cortical substance.
Where does blood go after interlobar artery?
The interlobar arteries, in turn, branch into arcuate arteries, cortical radiate arteries, and then into afferent arterioles. The afferent arterioles service about 1.3 million nephrons in each kidney. It is vital that the flow of blood through the kidney be at a suitable rate to allow for filtration.
Where are the interlobular veins located?
Scheme of renal tubule and its vascular supply. The stellate veins join to form the interlobular veins, which pass inward between the rays, receive branches from the plexuses around the convoluted tubules, and, having arrived at the bases of the renal pyramids, join with the venae rectae.
What is the Arcuate vein?
Medical Definition of arcuate vein
: any of the veins of the kidney that accompany the arcuate arteries, drain blood from the interlobular veins, and empty into the interlobar veins.
What drains the blood from the glomerulus?
Blood enters the glomerulus through an afferent arteriole, and exits via an efferent arteriole.
Is interlobular artery the same as cortical radiate?
The arcuate arteries give off branches that ascend in the cortex called cortical radiate arteries. The afferent arterioles branch off the cortical radiate arteries (a.k.a. interlobular arteries) and bring blood to the glomerulus.
What is the difference between interlobar and Interlobular?
An interlobar artery extends along the boundary of each renal lobe (renal column) and then branches at right angles to form an arcuate artery that runs along the corticomedullary junction (Fig. 11-7). Interlobular arteries branch from the arcuate artery and extend into the cortex.
Which vessel is a branch of the interlobular artery?
Many arteries, called interlobular arteries, branch off from the arcuate arteries and radiate out through the cortex to end in networks of capillaries in the region just inside the capsule. En route they give off short branches called the afferent arterioles, which carry blood to the glomeruli where…
What are the foot processes on podocytes?
The podocytes have long foot processes called pedicels, for which the cells are named (podo- + -cyte). The pedicels wrap around the capillaries and leave slits between them. Blood is filtered through these slits, each known as a filtration slit, slit diaphragm, or slit pore.
What is the function of venules?
Venules are the smallest veins and receive blood from capillaries. They also play a role in the exchange of oxygen and nutrients for water products. There are post-capillary sphincters located between the capillaries and venules. The venule is very thin-walled and easily prone to rupture with excessive volume.
Where is the renal medulla?
The renal medulla is the innermost part of the kidney. The renal medulla is split up into a number of sections, known as the renal pyramids. Blood enters into the kidney via the renal artery, which then splits up to form the segmental arteries which then branch to form interlobar arteries.
What is the afferent arteriole?
The afferent arteriole is an arteriole that feeds blood into the glomerulus. The renal arterioles play a central role in determining glomerular hydraulic pressure, which facilitates glomerular filtration.
What is a Vasa recta?
The vasa recta of the kidney, (vasa rectae renis) are the straight arterioles, and the straight venules of the kidney, – a series of blood vessels in the blood supply of the kidney that enter the medulla as the straight arterioles, and leave the medulla to ascend to the cortex as the straight venules.
What keeps the kidneys in place?
Each kidney is held in place by connective tissue, called renal fascia, and is surrounded by a thick layer of adipose tissue, called perirenal fat, which helps to protect it.
What is the main artery that leaves the heart?
Arteries. They begin with the aorta, the large artery leaving the heart. Arteries carry oxygen-rich blood away from the heart to all of the body’s tissues. They branch several times, becoming smaller and smaller as they carry blood farther from the heart.
What are the 7 functions of the kidney?
Kidney and its Function
- Removal of waste products.
- Removal of excess fluid.
- Balance minerals and chemicals.
- Control of blood pressure.
- Red blood cells production.
- To maintain healthy bones.
Why are nephrons wrapped in capillaries?
They filter waste from your blood so the waste can leave your body through urine (pee). Peritubular capillaries also reabsorb nutrients your body needs to work properly, such as minerals. You have millions of these capillaries inside your kidneys’ nephrons (filtering units).
What are the function of renal artery and renal vein?
Renal Veins carry filtered blood from the kidneys to the posterior vena cava. Renal Arteries carry unfiltered blood from the aorta to the kidneys.
What is the function of the glomerulus?
The glomerulus is clinically significant because it is the location where filtration in the kidney begins. All actions of the nephron downstream of the glomeruli rely on the passage of filtrate from the glomerular capillaries into Bowman’s space.
Why are podocytes important?
Podocytes play an important role in glomerular function. Together with endothelial cells of the glomerular capillary loop and the glomerular basement membrane they form a filtration barrier. Podocytes cooperate with mesangial cells to support the structure and function of the glomerulus.
How do podocytes perform filtration?
When it comes to glomerular filtration, podocytes play an active role in preventing plasma proteins from entering the urinary ultrafiltrate by providing a barrier comprising filtration slits between foot processes, which in aggregate represent a dynamic network of cellular extensions.
What is a podocyte cell?
Podocytes are specialized epithelial cells that cover the outer surfaces of glomerular capillaries. Unique cell junctions, known as slit diaphragms, which feature nephrin and Neph family proteins in addition to components of adherens, tight, and gap junctions, connect adjacent podocyte foot processes.
What is between Arteriole and venule?
Capillaries are minute thin-walled vessels that connect the arterioles and venules, it is through the capillaries that nutrients and wastes are exchanged between the blood and body tissues.
What is the difference between veins and venules?
The key difference between Vein and Venule is, the vein is a larger blood vessel that carries blood towards the heart while, the venule is a smaller minute blood vessel that drains blood from capillaries to the veins.
What arteries function?
Arteries. Arteries carry blood away from the heart. Pulmonary arteries transport blood that has a low oxygen content from the right ventricle to the lungs. Systemic arteries transport oxygenated blood from the left ventricle to the body tissues.
What absorbs pct?
The PCT is responsible for reabsorbing most of the glucose, amino acids, and small peptides that enter the ultrafiltrate (Berry and Rector 1991). The PCT contains numerous secondary active, sodium-coupled transporters for glucose (SGLT2) and amino acids (Silbernagl and Gekle 2008, Silverman 2008).
What are the 3 regions that make up a kidney?
The Kidneys Are Composed of Three Main Sections
Each kidney consists of an outer renal cortex, an inner renal medulla, and a renal pelvis. Blood is filtered in the renal cortex. The renal medulla contains the renal pyramids, where urine formation takes place. Urine passes from the renal pyramids into the renal pelvis.
Why is the medulla salty?
The body has a clever mechanism to conserve water levels, it creates a strong salt concentration in the medulla of the kidney via the Loop of Henle. This means that water can be drawn out of the tube later on by osmosis and taken away by the blood.
What are the afferent vessels that carry blood back to the heart?
The afferent vessels that carry blood back toward the heart are d) veins.
What is collecting duct of nephron?
The last part of a long, twisting tube that collects urine from the nephrons (cellular structures in the kidney that filter blood and form urine) and moves it into the renal pelvis and ureters. Also called renal collecting tubule.
What neurons are afferent?
Afferent neurons are sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain, while efferent neurons are motor neurons that carry neural impulses away from the central nervous systme and towards muscles to cause movement.