The excretory system removes waste from the body through the kidneys, ureters, bladder, and urethra. The kidneys contain a renal cortex and medulla, which filter blood to produce urine. The renal artery brings blood to the kidneys and renal vein carries urine away. Nephrons are the functional units of the kidneys that filter blood and regulate water and substances through filtration, reabsorption, and secretion. Urine is then stored in the bladder and exits the body through the urethra.

2. Excretory System
 is a passive biological system that removes excess,
unnecessary materials from an organism, so as to help
maintain homeostasis within the organism and
prevent damage to the body.

4.  Renal Cortex- It contains the renal corpuscles and
the renal tubules except for parts of the loop of
Henle which descend into the renal medulla. It also
contains blood vessels and cortical collecting ducts.
 Renal Medulla- 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 accurate arterioles.

5.  Renal Artery- takes blood into the kidney and renal
vein transports blood out of the kidney.
 Renal Vein- are veins that drain the kidney. They
connect the kidney to the inferior vena cava. They
carry the blood purified by the kidney. It also divides
into 2 divisions upon entering the kidney.
 Nephron- Its chief function is to regulate the
concentration of water and soluble substances like
sodium salts by filtering the blood, reabsorbing what
is needed and excreting the rest as urine

6. :
 Filtration- passage through a filter or other material that prevents
passage of certain molecules, particles, or substances.
 Reabsorption- this is where those substances needed by the body,
like sodium potassium ,are reabsorbed in the kidney to maintain the
correct amount of fluid and substances.
 Secretion- substances that are not required by the body and foreign
materials, like drugs, are then secreted from the blood into the urine.

8.  Kidneys- remove liquid waste from the blood in the form of urine.
Keep a stable balance of salts and other substances in the blood.
 Ureters- narrow tubes that carry urine from the kidneys to the
bladder. Muscles in the ureter walls continually tighten and relax
forcing urine downward, away from the kidneys.
 Urinary Bladder- the bladder's walls relax and expand to store
urine, and contract and flatten to empty urine through the urethra.
 Urethra- the tube that allows urine to pass outside the body.

9. Group Members:
 Alvarez, Dennis L.
 Cumpio, Joyce L.
 Atillo, Judith Fay
 Arcena, Sharmaine
 Pilola, Rangie
 Creer, Wilma Ephephita
 Ornopia, Julie