U5 B3 1TTOHV

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

B3 Hearing and sight

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

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 101-104

Lesson goals

• You can list the parts of the ear and their functions
• You can describe the structure and function of the eye

Today

• Wheel of homework
• Recap
• Ears
• Eyes
• Time for hw
• End

Which is the top/outer layer of the skin?

1. dermis
2. basal layer
3. corneal layer
4. subcutaneous connective tissue

What layer of the skin contains the most receptors?

1. dermis
2. basal layer
3. corneal layer
4. subcutaneous connective tissue

What layer of the skin helps keep you warm?

1. dermis
2. basal layer
3. corneal layer
4. subcutaneous connective tissue

What part of your skin will react when you are cold?

1. hair muscle
2. sweat gland
3. fat
4. sebaceous gland

A signal that goes through your nerves is called a ... (1 word)

The ear

Outer part

• 'catches' sounds

Inner parts

• Bring sound to the recptors
• Help you really hear the sound

Eye outside

eyebrow

Keeps sweat out of your eyes

Helps show emotion

Eyelid

Disperse tears over the eye

Keeps eye from drying out

eyelashes

Protects eye against light and dust

pupil

entrance for light

iris

changing the size of the pupil

sclera

hard protective outer layer of the eye

cornea

tough see-through protective layer of the eye

sclera

hard protective outer layer of the eye

Lens

Iris

Cornea

Eye muscle

Choroid

Retina

Fovea

Blind spot

Optic nerve

Sclera

Vitreous body

How you see 

Light falls on an object

Light is reflected by the object towards your eyes

The lens turns the image upside down

Optic nerve sends impulses containing the image towards the brains

The brains turns the image upside down again.

You now see the cup

02:47-02:57

Pupillary reflex

What you should do:

• Read pages  101-104
• Do asgmt  1-9,  pgs. 104-108

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 part of the eye changes light stimuli into impulses?

1. Pupil
2. Lens
3. Retina
4. Optic nerve

To see light must pass several parts of the eye. What is the correct order?

1. cornea, pupil, lens, retina
2. lens, retina, pupil, cornea, pupil,
3. pupil, lens, retina, cornea,
4. cornea, lens, cornea, pupil, retina

Where can we find the sensory receptors?

1. Blind spot
2. Retina
3. Optic nerve
4. Sclera

Which part of the eye changes shape by using a circular/ciliary muscle?

1. Iris
2. Pupil
3. Cornea
4. Lens

What part of your eye helps with focusing pictures?

1. cornea
2. lens
3. pupil
4. retina

Which image shows your eye in bright light?

1. left picture
2. right picture

Tidy Duty

Today these people are on tidy duty

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

What you should do:

• Read pages 101-104
• Do asgmt 1-8, 6c pgs. 104-108

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