EXCRETORY SYSTEM💩

SKIN

• The skin is an organ and part of
• excretory process because it secretes sweat
• which is a waste product.

KIDNEYS

• The kidneys are organs that are a part of the excretory process.
• They filter the blood and remove nitrogenous wastes and other harmful things.
• They filter urea from the blood which leaves the body as urine.

LUNGS

• The lungs are organs that are a part of the excretory process.
• They use respiration to remove gaseous wastes from the body.

LIVER

• The liver detoxifies the body by removing bacteria, hormones and drugs.
• It then turns them into harmless waste. The waste leaves the body as feces.
• The liver produces bile which the body uses to break down fat.

KIDNEY PARTS

• The indentation on the concave side of the kidney, known as the renal hilus,
• provides a space for the renal artery, renal vein, and ureter to
• enter the kidney.

NEPHRONS FUNCTION

• Each kidney contains around 1 million individual nephrons, the kidneys’
• microscopic functional units that filter blood to produce urine.
• The nephron is made of 2 main parts: the renal corpuscle and the renal
• tubule.
• Responsible for filtering the blood

FILTRATION

• The first step in the formation of urine is filtration.
• This is taking place in the renal capsule.
• This filtration takes places under pressure.
• Blood enters the glomerulus at high pressure direct from the heart.

REABSORBTION

• This process takes place as the filtrate passes through various sections of nephrons.
• Some areas are specifically adapted to reabsorb certain elements only.