3.5 Taking out the rubbish

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

excretion

lungs

kidneys

skin

large intestine

Which process is shown in the picture?

1. Diffusion
2. Osmosis
3. Gas exchange
4. Respiration

What do you know about 'excretion'?

excretion

Which of the following organs is not an excretory organ?

1. Kidney
2. Lungs
3. Skin
4. Liver

what is the way of urine?

a kidney

- blood enters via Renal Artery

- Flows to the Cortex

- is cleaned in Nephrons in the 

   Medulla

- blood flows through the Renal vein 

- urine flows to the Renal pelvis

- into the ureter

(- to the bladder)

The Bowman’s capsule (renal capsule):

surrounds a ball of capillaries called the capillary knot

high pressure is created in the capillary knot by the diameter of the capillary leaving the knot being narrower than the capillary entering

this pressure results in ultrafiltration where water, salts, glucose, and other small molecules pass out of the capillary and into the Bowman's capsule

proteins and blood cells are too big to leave the capillaries to go into the tubule

The rest of the tubule is responsible for the selective reabsorption of glucose, some salts, and lots of the water.

The collecting duct is responsible for the selective reabsorption of water and for sending urine to the ureter.

What is the tube called that runs from kidney to bladder?

1. Ureter
2. Urethra

Again, link the waste product to the organ!

Large intestine

Skin

Lungs

Kidneys

Carbon Dioxide

Other waste from blood

Undigested food

Salt

Water

Water

Water

Water

Salt