1.4 Breathing

• Biologie
• Middelbare school
• havo
• Leerjaar 2

Welcome- 2EH

• 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

Get your book

Complete ex. 10 , p.26

HOW IT FITS TOGETHER — the world we live in

Done?

Begin reading basic 1.4 

Today

• What is the difference between inhaled and exhaled air?
• How are inhalation and exhalation achieved? 

What process occurs (happens) in the chloroplast?

1. respiration
2. breathing
3. excretion
4. photosynthesis

What is the function of the epiglottis (strottenklepje)?

1. Closes the nasal cavity when swalloing
2. Protects the windpipe (and oesaphagus)
3. Makes sure food cannot get into your windpipe

Which statement about breathing through your nose is true?

1. The air contains more bacteria when you breathe through your nose.
2. The air is colder when you breathe through your nose.
3. The air is filtered and is warmed up when you breathe through your nose.
4. The air is filtered only when you breathe through your mouth.

What is the function of mitochondria?

1. The powerhouse of the cell
2. The powerhouse of the cell
3. The powerhouse of the cell
4. The powerhouse of the cell

Moistens and warms inhaled air

Makes sure food cannot get into your windpipe

flap that closes off the nasal cavity when you swallow food

Nasal lining

Epiglottis

Uvula

Alveoli

• Place where gas exchange happens
• Oxygen goes in
• Carbon dioxide goes out
• Transportation of gases through red blood cells

Gas exchange 

1) Oxygen comes from the air we inhale into the alveoli -> Oxygen goes from alveoli through the wall into the blood of the lung capillary -> blood brings Oxygen to all the cells in the body. 

2) Blood brings Carbon dioxide from cells to the lungs -> Carbon dioxide goes from blood through the walls into the alveoli -> We breath out the Carbon dioxide.

https://youtu.be/FJQxriDWkMs?si=Va49aUqjNk01ABBR

Respiratory muscles

• Chest breathing: intercostal muscles.

• Abdominal breathing: diaphragm.

Chest breathing

While we breath this way , we contract our  intercostal muscles, squeezing the air out of our lungs. When they relax, we breathe in again due to a difference in air pressure in and out of our lungs. 

Abdominal breathing

Sometimes you also see your belly move when you breath-->   due to abdominal breathing. Your diaphragm moves up and down. Squeezing out your lungs and creating positive and negative air pressure within your lungs. 

Thoracic inhalation:

air is sucked into the lungs

intercostal muscles contract

ribs pull the plearul membrane open

the plearul membrane pulls open the lungs

ribs move up

Drag the boxes on the right to the correct place in the picture.

Alveolus

Oxygen

Red blood cell

Blood with little oxygen

Blood with lots of oxygen

Air

CO2

Abdominal inhalation:

air is sucked into the lungs

abdominal muscles contract

the diaphragm moves down

the plearul membrane pulls open the lungs

the diaphragm pulls the pleural membrane open

To Do

1. Read basic 1.4 - breathing

2. Complete ex. 1-3 , 5-8 

3. Practice the flash cards out basics 1.1 -1.4