1
00:00:00,820 --> 00:00:11,439
Hello everyone! Today we are going to study about invertebrates. Ready? Let's start!

2
00:00:12,660 --> 00:00:23,059
Look, invertebrates do not have a backbone and a skeleton.

3
00:00:23,059 --> 00:00:34,740
In vertebrates, do not have a backbone and a skeleton.

4
00:00:36,140 --> 00:00:39,759
Class, mirror word.

5
00:00:41,700 --> 00:00:54,149
In vertebrates, do not have a backbone and a skeleton.

6
00:00:54,149 --> 00:01:28,030
Excellent, everybody. Well done. Now, there are many groups of invertebrates. Worms, mollusks, arthropods, sponges, jellyfish, and echinoderms.

7
00:01:28,030 --> 00:01:53,719
Class? Mirror word. There are many groups of invertebrates. Worms, mollusks, arthropods,

8
00:01:53,719 --> 00:02:13,710
sponges, jellyfish, and echinoderms. Excellent. Well done, everybody. But this year, we are

9
00:02:13,710 --> 00:02:32,389
going to study only mollusks and arthropods. Let's start. Look, we have here mollusks and

10
00:02:32,389 --> 00:02:51,780
arthropods. Let's see. Mollusks have a soft body, while arthropods have a segmented body

11
00:02:51,780 --> 00:02:55,639
and limbs, limbs.

12
00:02:57,900 --> 00:03:06,340
Class, mirror word,

13
00:03:09,080 --> 00:03:13,689
mollusks have a soft body.

14
00:03:17,139 --> 00:03:23,240
Arthropods have a segmented body

15
00:03:23,240 --> 00:03:27,639
and limbs.

16
00:03:33,719 --> 00:03:35,080
Well done, everybody.

17
00:03:36,259 --> 00:03:38,520
Now, look, this is the head,

18
00:03:39,300 --> 00:03:41,979
the thorax, the abdomen,

19
00:03:41,979 --> 00:03:44,800
the limbs, and the antenna.

20
00:03:45,080 --> 00:04:02,030
Next one, look, some mollusks, like slugs, have a shell to protect them.

21
00:04:02,030 --> 00:04:14,669
Other mollusks, like octopuses, have tentacles, shell, and tentacles.

22
00:04:14,669 --> 00:04:23,040
while arthropods have an exoskeleton.

23
00:04:24,720 --> 00:04:28,899
It is an external protection or armor.

24
00:04:30,480 --> 00:04:43,329
Class, mirror word, some mollusks, like slugs, have a shell.

25
00:04:43,329 --> 00:04:55,920
Other mollusks, like octopuses, have tentacles.

26
00:04:59,959 --> 00:05:04,980
Arthropods have an exoskeleton.

27
00:05:08,240 --> 00:05:14,389
It is an external protection and armor.

28
00:05:18,379 --> 00:05:19,519
Very good, everybody.

29
00:05:20,319 --> 00:05:21,220
Next one.

30
00:05:21,220 --> 00:05:27,620
Let's see. Is it an arthropod or a mollusk?

31
00:05:27,879 --> 00:05:34,009
Spider. Is it an arthropod or a mollusk?

32
00:05:37,209 --> 00:05:40,629
It's an arthropod. Well done.

33
00:05:41,329 --> 00:05:44,129
Next one, let's see. A snail.

34
00:05:44,709 --> 00:05:50,230
Is a snail an arthropod or a mollusk?

35
00:05:50,230 --> 00:05:55,310
Let's see. It's a mollusk.

36
00:05:55,410 --> 00:06:28,240
A beetle. Is a beetle an arthropod or a mollusk? It's an arthropod. An octopus. Octopus. Is it an arthropod or a mollusk? It is a mollusk. Very good.

37
00:06:28,240 --> 00:06:49,189
Next one, a butterfly. Is a butterfly an arthropod or a mollusk? Hmm, let's see. It's an arthropod. Well done. How about a crab?

38
00:06:49,189 --> 00:07:06,120
is a crab an arthropod or a mollusk of course it is an arthropod how about a squid

39
00:07:06,120 --> 00:07:13,860
is a squid an arthropod or a mollusk

40
00:07:13,860 --> 00:07:31,759
hmm it is a mollusk like the octopus how about a seahorse hmm is a seahorse an arthropod or a

41
00:07:31,759 --> 00:07:47,100
mollusk. Let's think. It is not an arthropod or a mollusk. It is a fish. It is a fish and

42
00:07:47,100 --> 00:07:57,220
it is a vertebrate. It is not an invertebrate. It is a vertebrate. How about a scorpion?

43
00:07:57,220 --> 00:08:04,779
Is the scorpion an arthropod or a mollusk?

44
00:08:07,149 --> 00:08:09,170
It is an arthropod.

45
00:08:09,889 --> 00:08:10,569
Well done.