Urinary System: Blood Flow in Kidney Diagram

Study Notes

Blood Flow in the Kidney

Segmental Arteries: Branch from the renal artery and enter the hilum of the kidney.
Interlobar Arteries: Arise from segmental arteries, ascend through renal columns towards the cortex, and branch into arcuate arteries at the apex of the medullary region.
Arcuate Arteries: Formed by the branching of interlobar arteries, these arteries run along the boundary between the cortex and medulla.
Cortical Radiate Arteries: Branch from arcuate arteries and ascend into the renal cortex, leading to afferent arterioles that supply blood to capillary networks and nephrons.
Afferent Arterioles: Subdivisions of cortical radiate arteries that directly supply blood to the nephrons for filtration.

Components of the Urinary System

Renal Artery: Initial blood supply source to the kidneys, responsible for delivering oxygenated blood.
Renal Vein: Final destination for deoxygenated blood, carries filtered blood away from the kidneys.
Ureters: Muscular tubes transporting urine from kidneys to the urinary bladder.
Urethra: Carries urine from the bladder to the outside of the body, facilitating urination.
Trigone: Triangular region in the bladder marked by the openings of two ureters and the urethra, important for urinary storage and exit.

Urination Process

Micturition: Medical term for the act of urination, indicating the body's process of expelling urine.
Internal Urethral Sphincter: Smooth muscle located at the base of the urinary bladder, controls the release of urine involuntarily.
External Urethral Sphincter: Skeletal muscle situated near the external urethral orifice, allowing voluntary control over urination.

Description

This quiz focuses on the blood flow in the kidney, highlighting key components such as segmental arteries, interlobar arteries, and arcuate arteries. Test your knowledge of the anatomy and function of the renal vascular system. Perfect for students studying the urinary system!