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Smell, touch and taste

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Subido el 13 de mayo de 2020 por Patricia S.

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Hello 6th graders, how are you today? 00:00:01
Today we are going to continue with the 5 senses. 00:00:05
Are you ready? 00:00:09
Ok, as you can see here, today we are going to continue with 3 5 senses. 00:00:10
Ok? 00:00:17
The smell, the touch and the taste. 00:00:18
If you remember, there are 5. 00:00:22
The sight, the hearing, the smell, the touch and the taste. 00:00:24
But today we are going to study three of them. Don't worry, because these three senses are very short and various, ok? 00:00:28
So we are going to start with the first one, ok? The first one is the smell. 00:00:38
The sense of the smell uses a very important organ that is the nose, ok? 00:00:48
the organ of the nose and with the smell or with the nose we detect odors if something smells good 00:00:56
or if something smells bad okay this drawing that you see here is the drawing of a nose 00:01:09
from the inside as if you were from one looking through one side and this is the 00:01:17
nose from the inside okay and you can see here that we can differentiate four 00:01:28
important parts the first one that we have here is the nasal cavity the nasal 00:01:34
cavity is just a space that we have in the inside a space that is here inside 00:01:42
okay so the air can enter so when I smell the air enters through the nasal 00:01:49
in the nasal cavity we have a special tissue that is the pituitary membrane 00:01:55
is a special tissue with a special cells olfactory cells the olfactory cells 00:02:01
detect how something smells if they detect the odors okay the pituitary 00:02:09
membrane sends this information to a special part that we have here that is this the olfactory bulb 00:02:16
okay the olfactory bulb takes this information from the olfactory cells and sends this information 00:02:27
to this part that we see here that is the olfactory nerve and the olfactory nerve 00:02:35
sends the information to your brain okay so as you can see it's very easy the air 00:02:45
enters through the nostrils that are the two holes the air enters in the nasal 00:02:53
cavity in the nasal cavity there is a special tissue the pituitary 00:02:59
in the brain with special cells that detect the odors. They send the information to the olfactory 00:03:04
bulb, the olfactory bulb sends the information to the olfactory nerve, and the olfactory nerve sends 00:03:13
the information to your brain. Easy, right? Maybe you can see better in this drawing. 00:03:18
The nostrils that are the two holes that we have here, the air enters through the nostrils, 00:03:26
enters in the nasal cavity. Inside the nasal cavity we have the pituitary 00:03:32
membrane with special cells, olfactory cells, that detect the odors. They send 00:03:39
the information to the olfactory bulb and the olfactory bulb sends the 00:03:45
information to the olfactory nerve that sends the information to your brain. Okay? 00:03:50
we are going to continue with the next sense it is the touch the sense of the 00:03:56
touch uses a very important and a very special organ that is the skin I said 00:04:06
is very special because the skin is the biggest organ of your body all your body 00:04:15
is covered by the skin okay this drawing that you see here is a drawing of the skin imagine 00:04:22
that you take a little bit of your skin and you cut it and put it in the microscope you will see 00:04:30
something like this these things that you see here of course these are your hairs okay and 00:04:36
And, well, what do you detect with the sense of the touch or with the skin? 00:04:45
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? 00:04:53
what are the two things that you need to study for the skin there is this and this if we see 00:05:11
the skin if you will see the strobing of the skin you see that there are like two layers one apart 00:05:21
that is like outside this is called the epidermis okay and one part that is inside that is this 00:05:28
thing that you see here in orange that is the dermis okay so we have the epidermis and the 00:05:38
dermis okay but you also see here uh these things inside the dermis there are nerves 00:05:48
there are a receptors for the temperature there are receptors for the pain there are tactile 00:05:59
receptors and there are also these little things that you see here that are 00:06:05
the sweat glands that we have studied in the excretory system remember how you 00:06:11
produce the sweat when you are doing exercise or running or something like this 00:06:16
but you don't need to study this this is just a curiosity what you need to know 00:06:21
is what do you see in yellow that with the touch we detect pressure temperature 00:06:26
textures and pain and that the skin has two layers the epidermis outside and the 00:06:32
dermis inside inside the dermis there are nerves that send the information to 00:06:40
your brain easy right okay so let's pass to the next of the five senses that is 00:06:47
the taste the organ that you use is the the tongue okay with the taste we detect flavors if something 00:06:54
when you eat something you you say if it is good or bad if it tastes is good or bad the flavors 00:07:10
okay if you look very very carefully to your tongue in the mirror you are going to see like 00:07:17
little points or little bumps, tiny bumps, this is an eye, sorry, tiny bumps or tiny 00:07:23
points that have special cells, taste cells, that detect the flavor and these cells send 00:07:33
the information to the gustatory nerve that sends the information to your brain. 00:07:41
So very easy, in the tongue. 00:07:47
We have taste buds, that are little points, with taste cells, special cells, that send 00:07:50
the information to the gustatory nerve that sends the information to your brain, ok? 00:07:57
And as I told you, with the taste we detect flavors. 00:08:04
There are four main flavors that we are going to study. 00:08:08
This one that you see here, the umami, is a new flavor that I put you here so you can 00:08:13
see, but we are not going to study, okay? But we have four special flavors. The 00:08:19
sour flavor, like the flavor of the lemon or the orange or any citrus fruit, you 00:08:25
can detect it with all your tongue, but especially, especially in these parts 00:08:32
from the sides, okay? The sweet flavors, that is the flavor of chocolate, sweets, 00:08:37
candies etc that you can detect it with all your tongue but especially with the 00:08:44
tip of your tongue this little part that we have here the bitter flavor that is 00:08:50
the flavor of things like broccoli tomato or peppers you can detect it with 00:08:58
all your tongue but especially with the back part of your tongue that you see 00:09:05
here and salty flavors that is the flavor of salt or fruits like pizza or 00:09:09
chips you can detect it with all your tongue but especially with the size of 00:09:17
your tongue that we have here okay so that's it as you can see this topic the 00:09:25
five senses is very interesting and today we have seen the smell the touch 00:09:35
and then taste and as you can see they are very very very easy okay I hope you 00:09:43
liked the video and I hope you are okay and I hope you understand everything 00:09:50
perfect okay so see you another day bye bye 00:09:57
Subido por:
Patricia S.
Licencia:
Todos los derechos reservados
Visualizaciones:
46
Fecha:
13 de mayo de 2020 - 11:57
Visibilidad:
Público
Centro:
CP INF-PRI DANIEL MARTIN
Duración:
10′ 04″
Relación de aspecto:
1.40:1
Resolución:
1186x848 píxeles
Tamaño:
99.40 MBytes

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