3.1 and 3.2 The skeleton

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!
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Slide 1: Slide
BiologieMiddelbare schoolvwoLeerjaar 1

This lesson contains 18 slides, with interactive quiz and text slides.

time-iconLesson 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!
  • Find the link in SomToday (click on the homework)

Slide 18 - Slide