B4 U3 2HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

B4 Excretion

• Take off your jacket
• Put your things on your desk

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 206-207

Lessongoals

• You can name the parts of the kidneys and urinary tracts with their features and functions

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Lymphatic vessels don't have a heartbeat, What things in lymphatic vessels keep the lymph from flowing in the wrong direction? (1 word)

A red blood cell is coming from the liver.
In what type of vessel is the cell now?

1. artery
2. vein
3. capillary

A red blood cell reaches the liver.
From which of these vessels could it have come?

1. portal vein
2. hepatic (liver) artery
3. both are possible
4. neither

The portal vein is the only vein not flowing towards the heart.
What is the purpose of the portal vein?

Waste in your body

Blood contains lots of waste:

• Carbon dioxide (CO₂)
• Excess nutrients
• Excess salts
• Excess water
• Dangerous substances
• Dead pathogens (bacteria, viruses) 

The kidney

Getting rid of waste 

from the body

= excretion

renal artery

renal vein

ureter

renal cortex

renal medulla

renal pelvises

Bladder

Blood transports many different substances throughout the body.

When do these substance go IN or OUT of the blood?

The image shows a schematic view of the double circulation

intestines

kidneys

All organs

lungs

vena cava

aorta

O2 in

O2 out

CO2 in

CO2 out

nutrients in

nutrients out

waste in

waste out

Water in

excess water out

What you should do:

• Read pages  206-207
• Do asgmt  1-7, 4c pgs. 207-209

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 206-207
  
• Do asgmt 1-7, 4c pgs. 207-209

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish