Today, we will discuss paragraph 3.1 and a little part of 3.2.
That is the only part of Chapter 3 that we will be discussing, so let's keep it short!
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Slide 1: Slide
BiologieMiddelbare schoolvwoLeerjaar 1
This lesson contains 18 slides, with interactive quiz and text slides.
Lesson duration is: 45 min
Items in this lesson
Welcome to this lesson!
Today, we will discuss paragraph 3.1 and a little part of 3.2.
That is the only part of Chapter 3 that we will be discussing, so let's keep it short!
Slide 1 - Slide
Planning
Introduction
Explanation
Homework & what about next week?
Work on exercises
Slide 2 - Slide
Zoom
At the end of this lesson (09.30) I will be available for questions via Zoom
You do not have to be there, unless you have questions!
Find the link in SomToday (click on the homework)
Slide 3 - Slide
Introduction
This paragraph is about the different types of skeletons animals can have
We will discuss the human skeleton a bit
At the end we will also discuss page 53 and page 54 of the textbook, which is a part of paragraph 5.2.
This is about the different types of bone in your body
Slide 4 - Slide
Why do we have a skeleton?
It helps you move
It protects your organs
It gives you shape and strength
It produces blood cells
Slide 5 - Slide
Skeletons
We have different types of skeletons:
Endoskeleton
Exoskeleton
Hydrostatic skeleton
We will discuss them all!
Slide 6 - Slide
Endoskeleton
Skeleton is inside the body
Not very heavy
Able to repair itself
Example: humans, dogs, ...
Slide 7 - Slide
Exoskeleton
Skeleton is outside the body
Often made of chitin
Very heavy
Animal has to moult (shed the skin and grow a new one)
Examples: insects, spiders, snails, crabs
Slide 8 - Slide
Hydroskeleton
Not really even a skeleton
Shape and support comes from water
Only animals that live in water
Out of the water: no shape and strength
Exampless: jellyfish
Slide 9 - Slide
Link to the correct skeleton type!
Exoskeleton
Endoskeleton
Hydrostatic skeleton
Starfish
Wasp
Snake
Only in water
Moults
Has bones
Slide 10 - Drag question
And humans?
We have an endoskeleton, that contains 4 parts:
Skull protects the brain
Backbone (or spine) carries the weight and protects the spinal cord
Rib cage protects lungs and heart
Limbs for locomotion (walking)
Spinal cord: consists of nerve tissue, so has to be protected. If the nerve tissue damages, you can't walk anymore
Slide 11 - Slide
Paragraph 3.2
Humans have two types of bones:
Cartilage
Bone
Slide 12 - Slide
Cartilage
Flexible
Prevents the bones from breaking
Protects the bones
Babies have a lot of it (need to be flexible), most of it will be replaced by bone later on
Adults: ears, nose, in the joints
Joint = gewricht
Slide 13 - Slide
Bone
Less flexible, but very tough
Grows and repairs itself
Blood vessels go through it
Slide 14 - Slide
That was it!
That's all you need to know for the skeleton
Paragraph 3.1
Paragraph 3.2 (page 53 and 54)
Now, I'll explain what the homework is and what we're going to do next week
Slide 15 - Slide
Homework (weektaak)
Make exercise 1-7 of paragraph 3.1
Read both paragraphs again and take notes if you need to
Build your own human skeleton with things you can find at home (paper, sticks, leaves, pens, pasta, ...). Lay it out on a table or floor, and take a picture of it. Do this before next Friday! (example on the next page). I will upload a document on SomToday that explains how you do it.
Slide 16 - Slide
Slide 17 - Slide
Zoom
At the end of this lesson (09.30) I will be available for questions via Zoom
You do not have to be there, unless you have questions!