Answer» - The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes.
- The Excretory system is responsible for the elimination of wastes produced by homeostasis.
- There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.
- Every human has two kidneys.
- Each kidney is made up of three sections: the renal cortex, the renal medulla and the renal pelvis.
- The blood arrives at the kidney via the renal artery, which splits into many afferent arterioles.
- These arterioles go to the Bowman's Capsules of nephrons, where the wastes are taken out of the blood by pressure filtration.
- Peritubular capillaries also surround the nephron so substances can be taken in and out of the blood.
- The renal cortex is the outer layer of the kidney and the medulla is the inner layer of the kidney.
- The renal pelvis takes urine away from the kidney via the ureter.
- Both of the ureters lead the urine into the body's only urinary bladder, which expands and sends nerve impulses when full.
- From there, urine is expelled through the urethra and out of the body.
|
