1
00:00:01,330 --> 00:00:03,990
Hello 6th graders, how are you today?

2
00:00:05,030 --> 00:00:08,589
Today we are going to continue with the 5 senses.

3
00:00:09,269 --> 00:00:09,849
Are you ready?

4
00:00:10,849 --> 00:00:17,030
Ok, as you can see here, today we are going to continue with 3 5 senses.

5
00:00:17,410 --> 00:00:17,690
Ok?

6
00:00:18,149 --> 00:00:21,670
The smell, the touch and the taste.

7
00:00:22,170 --> 00:00:24,129
If you remember, there are 5.

8
00:00:24,850 --> 00:00:28,929
The sight, the hearing, the smell, the touch and the taste.

9
00:00:28,929 --> 00:00:38,929
But today we are going to study three of them. Don't worry, because these three senses are very short and various, ok?

10
00:00:38,929 --> 00:00:48,929
So we are going to start with the first one, ok? The first one is the smell.

11
00:00:48,929 --> 00:00:56,929
The sense of the smell uses a very important organ that is the nose, ok?

12
00:00:56,929 --> 00:01:09,109
the organ of the nose and with the smell or with the nose we detect odors if something smells good

13
00:01:09,109 --> 00:01:17,989
or if something smells bad okay this drawing that you see here is the drawing of a nose

14
00:01:17,989 --> 00:01:28,450
from the inside as if you were from one looking through one side and this is the

15
00:01:28,450 --> 00:01:34,150
nose from the inside okay and you can see here that we can differentiate four

16
00:01:34,150 --> 00:01:42,510
important parts the first one that we have here is the nasal cavity the nasal

17
00:01:42,510 --> 00:01:49,329
cavity is just a space that we have in the inside a space that is here inside

18
00:01:49,329 --> 00:01:55,090
okay so the air can enter so when I smell the air enters through the nasal

19
00:01:55,090 --> 00:02:01,569
in the nasal cavity we have a special tissue that is the pituitary membrane

20
00:02:01,569 --> 00:02:09,250
is a special tissue with a special cells olfactory cells the olfactory cells

21
00:02:09,250 --> 00:02:16,030
detect how something smells if they detect the odors okay the pituitary

22
00:02:16,030 --> 00:02:27,849
membrane sends this information to a special part that we have here that is this the olfactory bulb

23
00:02:27,849 --> 00:02:35,409
okay the olfactory bulb takes this information from the olfactory cells and sends this information

24
00:02:35,409 --> 00:02:45,930
to this part that we see here that is the olfactory nerve and the olfactory nerve

25
00:02:45,930 --> 00:02:53,710
sends the information to your brain okay so as you can see it's very easy the air

26
00:02:53,710 --> 00:02:59,229
enters through the nostrils that are the two holes the air enters in the nasal

27
00:02:59,229 --> 00:03:04,650
cavity in the nasal cavity there is a special tissue the pituitary

28
00:03:04,650 --> 00:03:13,050
in the brain with special cells that detect the odors. They send the information to the olfactory

29
00:03:13,050 --> 00:03:18,810
bulb, the olfactory bulb sends the information to the olfactory nerve, and the olfactory nerve sends

30
00:03:18,810 --> 00:03:25,930
the information to your brain. Easy, right? Maybe you can see better in this drawing.

31
00:03:26,969 --> 00:03:32,409
The nostrils that are the two holes that we have here, the air enters through the nostrils,

32
00:03:32,409 --> 00:03:39,210
enters in the nasal cavity. Inside the nasal cavity we have the pituitary

33
00:03:39,210 --> 00:03:45,009
membrane with special cells, olfactory cells, that detect the odors. They send

34
00:03:45,009 --> 00:03:50,469
the information to the olfactory bulb and the olfactory bulb sends the

35
00:03:50,469 --> 00:03:56,550
information to the olfactory nerve that sends the information to your brain. Okay?

36
00:03:56,550 --> 00:04:06,900
we are going to continue with the next sense it is the touch the sense of the

37
00:04:06,900 --> 00:04:15,259
touch uses a very important and a very special organ that is the skin I said

38
00:04:15,259 --> 00:04:22,040
is very special because the skin is the biggest organ of your body all your body

39
00:04:22,040 --> 00:04:30,980
is covered by the skin okay this drawing that you see here is a drawing of the skin imagine

40
00:04:30,980 --> 00:04:36,980
that you take a little bit of your skin and you cut it and put it in the microscope you will see

41
00:04:36,980 --> 00:04:45,800
something like this these things that you see here of course these are your hairs okay and

42
00:04:45,800 --> 00:04:53,449
And, well, what do you detect with the sense of the touch or with the skin?

43
00:04:53,550 --> 00:05:11,029
We detect a lot of things, but especially things like pressure, okay, temperature, if something is hot or cold, textures, and pain, if something hurts you, the pain, okay?

44
00:05:11,029 --> 00:05:21,290
what are the two things that you need to study for the skin there is this and this if we see

45
00:05:21,290 --> 00:05:28,910
the skin if you will see the strobing of the skin you see that there are like two layers one apart

46
00:05:28,910 --> 00:05:38,629
that is like outside this is called the epidermis okay and one part that is inside that is this

47
00:05:38,629 --> 00:05:47,350
thing that you see here in orange that is the dermis okay so we have the epidermis and the

48
00:05:48,949 --> 00:05:59,699
dermis okay but you also see here uh these things inside the dermis there are nerves

49
00:05:59,699 --> 00:06:05,779
there are a receptors for the temperature there are receptors for the pain there are tactile

50
00:06:05,779 --> 00:06:11,300
receptors and there are also these little things that you see here that are

51
00:06:11,300 --> 00:06:16,740
the sweat glands that we have studied in the excretory system remember how you

52
00:06:16,740 --> 00:06:21,699
produce the sweat when you are doing exercise or running or something like this

53
00:06:21,699 --> 00:06:26,300
but you don't need to study this this is just a curiosity what you need to know

54
00:06:26,300 --> 00:06:32,959
is what do you see in yellow that with the touch we detect pressure temperature

55
00:06:32,959 --> 00:06:40,360
textures and pain and that the skin has two layers the epidermis outside and the

56
00:06:40,360 --> 00:06:47,480
dermis inside inside the dermis there are nerves that send the information to

57
00:06:47,480 --> 00:06:54,360
your brain easy right okay so let's pass to the next of the five senses that is

58
00:06:54,360 --> 00:07:10,379
the taste the organ that you use is the the tongue okay with the taste we detect flavors if something

59
00:07:10,379 --> 00:07:17,879
when you eat something you you say if it is good or bad if it tastes is good or bad the flavors

60
00:07:17,879 --> 00:07:23,519
okay if you look very very carefully to your tongue in the mirror you are going to see like

61
00:07:23,519 --> 00:07:33,379
little points or little bumps, tiny bumps, this is an eye, sorry, tiny bumps or tiny

62
00:07:33,379 --> 00:07:41,879
points that have special cells, taste cells, that detect the flavor and these cells send

63
00:07:41,879 --> 00:07:47,220
the information to the gustatory nerve that sends the information to your brain.

64
00:07:47,220 --> 00:07:50,160
So very easy, in the tongue.

65
00:07:50,160 --> 00:07:57,019
We have taste buds, that are little points, with taste cells, special cells, that send

66
00:07:57,019 --> 00:08:04,439
the information to the gustatory nerve that sends the information to your brain, ok?

67
00:08:04,439 --> 00:08:08,839
And as I told you, with the taste we detect flavors.

68
00:08:08,839 --> 00:08:13,379
There are four main flavors that we are going to study.

69
00:08:13,379 --> 00:08:19,399
This one that you see here, the umami, is a new flavor that I put you here so you can

70
00:08:19,399 --> 00:08:25,519
see, but we are not going to study, okay? But we have four special flavors. The

71
00:08:25,519 --> 00:08:32,580
sour flavor, like the flavor of the lemon or the orange or any citrus fruit, you

72
00:08:32,580 --> 00:08:37,820
can detect it with all your tongue, but especially, especially in these parts

73
00:08:37,820 --> 00:08:44,840
from the sides, okay? The sweet flavors, that is the flavor of chocolate, sweets,

74
00:08:44,840 --> 00:08:50,299
candies etc that you can detect it with all your tongue but especially with the

75
00:08:50,299 --> 00:08:58,360
tip of your tongue this little part that we have here the bitter flavor that is

76
00:08:58,360 --> 00:09:05,419
the flavor of things like broccoli tomato or peppers you can detect it with

77
00:09:05,419 --> 00:09:09,419
all your tongue but especially with the back part of your tongue that you see

78
00:09:09,419 --> 00:09:17,940
here and salty flavors that is the flavor of salt or fruits like pizza or

79
00:09:17,940 --> 00:09:25,980
chips you can detect it with all your tongue but especially with the size of

80
00:09:25,980 --> 00:09:35,820
your tongue that we have here okay so that's it as you can see this topic the

81
00:09:35,820 --> 00:09:43,019
five senses is very interesting and today we have seen the smell the touch

82
00:09:43,019 --> 00:09:50,820
and then taste and as you can see they are very very very easy okay I hope you

83
00:09:50,820 --> 00:09:57,740
liked the video and I hope you are okay and I hope you understand everything

84
00:09:57,740 --> 00:10:03,740
perfect okay so see you another day bye bye