3.4 Excretion

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

Welcome- 3EH

• Please take your seat
• Get you notebook , book and pen.
• Take out your coat and wait quietly for the Assignment in the next dia. 

To do - 7 min

Get your workbook and complete assignment 11: HOW IT FITS TOGETHER — Science

Done?

Begin reading the next basic: 1.5 - Excretion 

Which one picks up Oxygen?

1. White blood cells
2. Red blood cells
3. Platelets

Which one is the shortest circulation?

1. Pulmonary
2. Systemic

Through which side of the heart flows oxygenated blood?

1. Right side
2. Left side

The heart pumps oxygen rich blood into the?

1. Superior vena cava
2. Pulmonary arteries
3. Aorta
4. Aorta and pulmonary arteries

Which part of the circulatory system prevents blood from flowing back?

1. Veins
2. Arteries
3. Valves
4. Atria

The heart receives oxygen rich blood from the ...

1. Pulmonary veins
2. Pulmonary arteries
3. Coronary arteries/veins
4. Aorta

Put the texts underneath the corresponding picture.

Cardiac pause - heart fills with blood

Atria contract

Cardiac pause - heart fills even more with blood

Ventricles contract

Blood flows into arteries

Today - Basic 3.4 - Excretion 

Goal:

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

Practice: 

Ex. 1-8

Execretory organs

Excretion = to get excess, unnecessary, and toxic substances from your blood and remove it from your body

Execretory organs = lungs, liver, kidneys, skin

Components of a kidney

Renal cortex

Renal medulla

Renal pelvis

Renal cortex & Renal medulla

Remove from the blood:

• Waste products
• Excess water
• Excess salt
• All harmful substances

• Combined we call this:  urine

Renal pelvis

Collects the urine

Collected urine is transported to the bladder through the ureters.

kidneys

excrete water, minerals and other waste products

Kidneys

• Two kidneys
  
• Receive blood from renal artery
  
• Blood plasma is filtered from waste products and excess substances.
  
• Result is urine.`
• Molecules that the body doesn't need are removed --> excretion.
  
• The kidneys filter ~  180 liter a day 

 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)

Urine

-Formed in the renal 

medulla.

-Gathered in the renal

 pelvis.

-Exits kidney through

\ureter(2x)

-Stored in bladder.

-Excreted - urine

renal artery

renal vein

ureter

renal cortex

renal medulla

renal pelvises

Bladder

Does the renal artery transport oxygen rich or oxygen poor blood?

1. Oxygen rich
2. Oxygen poor
3. Renal artery?
4. I forgot

What are the components of a kidney?

1. Renal cortex, renal artery and renal pelvis.
2. Renal pelvis, renal medulla and renal vein.
3. Renal medulla, renal cortex and renal artery.
4. Renal cortex, renal medulla and renal pelvis.

What is the name of the component that transports urine to the bladder?

1. Urethra
2. Renal pelvis
3. Ureter

arteries carry blood to the heart

1. false
2. true

In which order does the blood flow through the heart?

1. atrium right; atrium left; down to ventricle
2. down to ventricle; atrium left; atrium right; down to ventricle
3. atrium left; down to ventricle; atrium right; down to ventricle
4. atrium right; down to ventricle; left atrium; down to ventricle

Practice + H.W

Read basic 3.4

Complete ex. 1-8