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INTERNAL PARTS-CORNEA, PUPIL AND IRIS

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Subido el 29 de abril de 2020 por Patricia S.

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Now, from the inside, we see something like this. 00:00:03
This is like a ball, okay? 00:00:09
Like a small ball that we have inside. 00:00:11
If I put it like this, you see this part, that would be the external part, 00:00:14
and this part, that would be the internal part. 00:00:20
It's like a ball that we have here, okay? 00:00:24
In this ball, in this eyeball, we have different parts. 00:00:27
The first one, the cornea, very simple, is just a layer, transparent layer of cells that protects your eye. 00:00:34
Okay? It's something very simple. 00:00:46
A layer of cells for protection. 00:00:48
The next part is the pupil. 00:00:51
The pupil is the black circle that you see in the eye. 00:00:54
But if you see here, you don't see anything. 00:01:00
There is a hole. 00:01:04
There is nothing here. It's a hole. 00:01:06
Yes, because the pupil is a hole. 00:01:09
It's like a door to the inside of your eye. 00:01:13
Okay? And we have this hole, this door, so the light can enter inside. 00:01:17
If the pupil is bigger, more light can enter. 00:01:24
And if the pupil is smaller, a little bit of light can enter. 00:01:28
So when we are in the dark of the night, the pupil gets bigger, so more light can enter. 00:01:33
And like this, you can see better. Okay? 00:01:40
but how can we control the pupil? How can we make the pupil bigger or smaller? Very simple, 00:01:43
with the iris, okay? The iris is the color part of your eyes. It's a ring of color and in the 00:01:51
middle of the ring we have the pupil, the hole or the door to the inside. The iris is the part 00:02:01
that opens and closes okay it gets bigger and smaller to make the pupil 00:02:10
bigger and smaller maybe you can see better like this if you see here this is 00:02:18
the pupil okay this hole this space that we have here and this and this is the 00:02:26
iris okay and I want you to look at the iris and these parts because when it's 00:02:36
cloudy so when there is not a lot of light the iris contracts so the whole of 00:02:46
the pupil gets bigger and more light coming you see how much light enters 00:02:55
here. But when there is a lot of light, the iris expands like this. The hole gets 00:03:02
smaller and only a little bit of light can enter. And if you see here is going to 00:03:10
appear an iris. Do you see? Sorry, an eye. Do you see here the pupil is smaller and 00:03:16
and here the pupil is bigger. More light connector, a little bit of light enters. Do you see? 00:03:24
Subido por:
Patricia S.
Licencia:
Todos los derechos reservados
Visualizaciones:
107
Fecha:
29 de abril de 2020 - 17:46
Visibilidad:
Público
Centro:
CP INF-PRI DANIEL MARTIN
Duración:
03′ 39″
Relación de aspecto:
1.79:1
Resolución:
1936x1082 píxeles
Tamaño:
153.13 MBytes

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