Os damos la bienvenida al Blog de las asignaturas bilingües de 4º de primaria. Servirá como
herramienta de repaso de los contenidos que vayamos trabajando en el aula a
diario. Es recomendable su uso diario para repasar y reforzar desde casa.
Está diseñado para que vuestros hijos puedan trabajar
solos, pues todo lo que vamos subiendo se ha trabajado previamente en clase.
Os iremos informando de las novedades que vayan
surgiendo.
Muchas gracias por vuestra colaboración. Recibidun cordial saludo.
The skin is the organ of touch. It is the largest organ. We use our skin to identify if something is hot or cold (temperature), hard or soft, smooth or rough (texture).
Our body is covered in skin which has nerve endings that pick up information and send it to the brain.
In some parts of our skin we have more nerve endings so they are more sensitive like the palms of our hands or the soles of our feet.
The skin is made up of three layers:
The epidermis: Melanin is here. The dermis: Nerve endings, blood vessels and sweat glands are here.
The subcutaneous layer: Hair follicle and fat are here.
The ear is made up of three different sections: the outer ear, the middle ear, and the inner ear. These parts all work together so you can hear and process sounds.
VIDEO to explain how the ear works.
PARTS OF THE EAR:
HOW THE EAR WORKS A sound wave comes in from the outside. It is collected by the pinna and enters the ear canal.
After it passes through the outer ear the sound waves strike the ear drum.
Then, the sound waves hit the ear drum and make it vibrate. This vibration moves the hammer, then the anvil and finally the stirrup.
Then the stirrup moves and pushes against the cochlea.
In the cochlea, sound moves as a wave creating vibrations.
The cochlea contains fine hairs that are moved by the sound waves. This movement of the hairs causes electrical impulses that travel up the auditory nerve to the brain.
The brain makes sense of the signals and tells us what we can hear.
