Lesson video

Hello, my name is Mrs. Begum, and I'm so excited to be learning all about carnivore, herbivore, and omnivore teeth with you today.

Let's begin.

Welcome to today's lesson from the unit introduction to the human digestive system.

Your lesson outcome today is, I can compare the teeth of carnivores, herbivores, and omnivores.

Now, I know that learning can sometimes be a little bit challenging, but that's okay because we are going to work together, and we are going to work really hard to learn lots of fabulous new things.

Now, here are your five key words for today's lesson.

You don't need to jot these down because I am going to be referring to them throughout today's video.

However, if you find that it is easier for you to have these on hand and written down, you can pause the video here and do that now.

Off you go.

Fantastic.

Well done.

And here are the definitions for those five keywords.

Again, I am going to be referring to these definitions throughout today's lesson, so you don't need to have them written down.

However, if you find that it does help you, you can pause the video here and write them down.

Fantastic.

Well done.

Now our lesson today is split into two parts.

Let's begin with the first one, animal teeth.

So different animals have different diets.

We have some pictures here of three different types of animals eating.

Now, do you know what these animals eat? You've got a little bit of a clue here.

I want you to have a really good think.

I'll give you five seconds, off you go.

Well done.

Fantastic.

So different animals have different types of teeth depending on their diet.

So here we have a bear, crocodile, and horse.

Now I want you to look really carefully at the similarities and differences between these animal teeth.

I want you to look at the shapes and the sizes of their teeth.

What do you notice? I'll give you five seconds to think about your answer, but if you feel that you need longer, you can pause the video here and you can have a really good look at these.

Off you go.

Fantastic.

Well done.

So let's have a look at this question.

It says, "Do all animals have incisors, canines, and molars?" What do you think? I'll give you five seconds to think about your answer.

Fantastic.

Well done.

So this alligator here has no molars.

It only has sharp incisors and pointed canines for ripping and tearing meat.

Here we have the horse's teeth.

Now young horses do not have canine teeth.

Their incisors cut food such as grass, and their molars chew and grind it down.

So true or false, all animals have the same types of teeth.

Is that true or false? I'll give you five seconds to think about your answer.

Off you go.

fantastic, well done.

The answer is false.

They do not all have the same types of teeth.

Now, is it because humans have special types of teeth and all other animals have the same type of teeth? Or is it because animals have different types of teeth depending on the food that they eat, the food in their diet? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

The answer is B.

Animals have different types of teeth depending on the food in their diet.

Now, some animals, like many humans, are omnivores, and that means that their diet consists of plants and other animals.

Now I want you to think really carefully.

Can you name any omnivores apart from humans? I'll give you five seconds to have a good think.

Off you go.

Fantastic.

Well done.

So a fox is an omnivore, a badger, and an ant as well.

So these are all types of omnivores.

Now, most omnivores have both flat, bumpy teeth and sharp pointed teeth.

Now the omnivore has molars to grind up plants, and sharp canines and incisors to bite, rip and tear fish.

Now, this omnivore uses its sharper incisors and canines to bite and tear food like beetles, and they use their molars to grind down fruit and mushrooms. So let's have a look at this question.

He says, "Which of these described the type of teeth and omnivore needs?" Is it A, sharp pointed teeth for ripping and tearing meat? B, flat, bumpy teeth to grind plants and sharp pointed teeth to bite, rip, and tear flesh over animals, or C, flat bumpy teeth to grind the food from plants.

So I will give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

The answer is B, flat, bumpy teeth to grind plants and sharp, pointed teeth to bite, rip, and tear flesh of animals.

Now, some animals diets consist mostly of meat or the flesh of animals, and these are called carnivores.

Can you name any carnivores? So think about animals whose diets would consist mainly of meat or the flesh of animals.

I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

So a cat, for example, a barn owl, and a pike.

Now most carnivores have strong jaws with hard, sharp pointed teeth.

The carnivore uses its canines and incisors to bite, rip and tear the flesh of its prey.

And many carnivores also possess a few sharp molars in the back of their mouths for grinding food so it can be swallowed.

So I want you to think, look at these teeth.

Think about what we have said about what kind of teeth belong to an omnivore, what kind of teeth might belong to a carnivore? Which of these do you think belong to a carnivore.

I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

The answer is B and C, the lion and the shark.

Now, some animals diets consist only of plants, like fruit and seeds, and they are called herbivores.

And there's a little clue in their name 'cause it says the word herb, which is a type of plant.

So herbivores are animals whose diet consists only of plants like fruit and seeds.

Now can you name any herbivores? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

So you may have thought of a rabbit, an elephant, or a blue tang fish.

Now most herbivores have large, wide bumpy teeth, and they use their strong molars to grind plants down.

So some herbivores, like sheep, have a tough toothless dental pad on top of their teeth to help chew the plants that they eat.

Now, a beaver is a type of herbivore animal with large strong incisors that are orange coloured.

So you can spot them just there, they're quite large.

Now why do you think a beaver might have teeth like this? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

So beavers use their incisors to gnaw through trees which they use to build their dams. And the orange colour is a special coating that helps to keep them strong.

So I want you to look at these teeth.

Which teeth do you think belong to a herbivore? So think carefully about what a herbivore might eat, and which of these would belong to a herbivore? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

So it would be the beaver and the horse.

What type of animal is Andeep's pet? Andeep says, "My python has a strong jaw with only long, sharp, pointed teeth that it uses to hold its prey before it swallows it whole." So what type of animal do you think Andeep's pet is? Do you think it's an omnivore, a carnivore, or a herbivore? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

The answer is a carnivore.

Now, here is your first task.

You are going to choose an animal.

I want you to research what it eats, and what type of teeth it has using books or the internet.

So I want you to imagine that you're this animal, and I want you to hotseat in character as this animal describing your teeth and diet.

Ask a friend to decide from your description of the animal's teeth and diet, whether it's a herbivore, a carnivore, or an omnivore.

So I'd like you to pause the video now and have a go at this activity.

Off you go.

Fantastic.

Well done.

So somebody has written, "I'm a giraffe.

I have extra long incisors to bite leaves off the trees.

I have lots of big flat molars at the back of my mouth to crush the plants I eat.

I have firm dental pad over some of my teeth to help me grind up the chutes and leaves I eat." Now, you may have chosen a different animal.

So somebody said that I think this, I think a giraffe is a herbivore based on what this person has written.

So we are now on to the second part of our learning today, which is comparing animal teeth.

Scientists who study animals are called zoologists.

They study the behaviour and diets of different animals to help them learn more about them.

Now, part of their job might be to use their observations and carry out research to compare the teeth of different animals.

Now before we carry on, I want you to think about this question.

It says, "What observations can you make about these animals' teeth?" So you might want to pause the video here so you can have a really good look, and really observe closely.

Off you go.

Fantastic.

Well done.

So you might have said that a crocodile has sharp pointed teeth all along their strong long jaw, and they have a very, very long jaw there.

An opossum has pointed teeth at the front and flatter bumpy teeth towards the back.

And an alpaca has large teeth at the front and a toothless dental pad at the top of its mouth.

Now, a zoologist would use their observations of teeth to classify the animals as herbivore, carnivore, and omnivore.

So a crocodile would be a carnivore, an opossum would be an omnivore, and an alpaca would be a herbivore.

Now, let's have a look at this question.

It says, "What could a scientist do to help them to compare the teeth of different animals?" Would it be A, ask different animals? B, visit a dentist, or C, make observations? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

The answer is C, make observations.

Now, scientists are able to compare teeth of living animals or use the skulls of animals that have died to help understand what diet and animal may have.

So looking at skulls of animals that lived a long time ago allows them to see if the animal was an omnivore, carnivore, or herbivore from its teeth.

Now, what do you think a scientist can find out about this animal's diet here? So have a really good look at its teeth.

What kind of diet do you think this animal might have had? Off you go.

Fantastic.

Well done.

So this animal has long, sharp canine teeth for ripping meat, sharp pointed, jagged teeth for chewing meat, a jaw that can open wide, and we can use our observations to classify this animal as a carnivore.

Now, which animal would a scientist decide belonged to a carnivore? Would you say it was A, B or C? I'll give you five seconds to think about your answer.

Off you go, fantastic.

Well done.

The answer is C.

Now this animal has flat, wide, and bumpy teeth for chewing and grinding down food such as plants.

And these teeth belong to a herbivore.

This animal has two long, sharp canines at the front for tearing and ripping, many jagged pointed teeth along the jaw for biting and chewing meat.

So these teeth belong to a carnivore.

This animal has sharp flat teeth at the front for biting, wide, bumpy teeth at the back for chewing and grinding, and very sharp canine teeth in the form of tusks.

And these teeth belong to an omnivore.

Now, which of these could a scientist observe to understand what diet and animal may have? Is it A, the habitat of the animal, B, the teeth of the animal, or C, the size of the animal? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

The answer is B, the teeth of the animal.

So here we have a macaque monkey.

Now, Andeep says, "I think this animal is a carnivore because it has sharp teeth at the front." Jacob says, "I think it's an omnivore, because it has sharp teeth at the front, and wide bumpy teeth at the back." And Izzy says, "I think this animal is a herbivore as it has flat, bumpy teeth for grinding plants." Who do you think is correct? I'll give you five seconds to think about your answer.

Off you go.

Fantastic.

Well done.

It would be Jacob, I think who thinks it was an omnivore because it had sharp teeth at the front, and wide bumpy teeth at the back.

Now here is task B.

As a zoologist, you've been given some photographs of unknown animals to observe.

I want you to compare the photographs from A to F.

Explain what type of food you think each animal eats and why, and use this information to decide if each animal is an omnivore, the carnivore, or a herbivore.

So here are the pictures A to F.

So I want you to do now is to pause the video and have a go at this activity.

If you need to go back to have a look at exactly what you need to do, that's absolutely fine.

So I'd like you to pause the video now and have a go.

Off you go.

Fantastic.

Well done.

So let's have a look at the answers.

So we have C, which is a fox and D, which is a human, and these are omnivores.

So they have sharp canines up front, incisors for tearing and biting, and molars at the back for chewing and grinding.

They eat food from plants and other animals.

Now you have E and A.

So E is from a shark and A is from a Tasmanian devil.

And they are carnivores and their sharp teeth.

Their teeth are sharp and pointed for ripping and tearing flesh from other animals.

And then finally, you have B and F.

So B is a camel, and F is from a cow, and they are herbivores.

They have some flat, larger teeth at the front for biting plants and lots of bumpy, wider teeth at the back for grinding them down.

Well done.

So we are now on to the summary of your learning for today.

Most omnivores have both flat, bumpy teeth and sharp pointed teeth.

Most carnivores have hard, sharp pointed teeth to bite, rip, and tear their food.

Most herbivores have large, wide, bumpy teeth to chew and grind their food.

Scientists make observations to compare animal's teeth, and understand what diet an animal may have.

You have worked really hard and you have learned some fabulous new things today.

I'm so proud of you, well done.