The nervous system.

The locomotor system.

The cardiorespiratory system.

The nervous system sends the

movement order from the brain to the

muscles.

The main structures of the nervous

system that play an important rol in the

movement are these three:

The brain.

The spinal cord.

The nerves.

The brain is like a computer that

analyses the things that happen

around us and decide:

When should we move.

How should we move.

The brain sends the

order of movement

through the spinal cord.

The spinal cord is a

long tube of nervous

tissue that conects the

brain with the rest of the

body.

The nerves are small structures that

conect the spinal cord with the

muscles. That way the order of

movement sent by the brain can get

the muscles.

The locomotor system is the system

that provoques the movement.

The locomotos system can by divided

into two parts:

Skeleton.

Muscles.

The skeleton is a

structure made up of

bones and joints. This is

the passive part of the

movement

Bones are hard and

rigid structures where

the muscles are fixed.

The most important

bones in our body are

those taht you can

see in the picture.

Joints are structures

where two o more

bones are together.

You can see in the

picture the most

important joints involve

in movements.

Muscles are the most

important structures

in terms of movement

because they are

able to contract. In

the picture you can

see the most

important muscles of

our body.

When muscles contract, the pull the

bones where they are fixed. That is

the way the movement is produced.

This system provides the

energy that the muscles

need to contract. This

energy is called ATP.

This system is the result of the

interaction between two systems:

Cardiac system.

Respiratory system.

The respiratorysystem is soimportant because itgives us the oxygenthat our musclesneed to get theenergy to contractand helps us toeliminate the carbondioxide which is badfor our body.

The most important organ

in the respiratory system

are the lungs because it is

there where the oxygen

gets into the blood and the

blood delivers there the

carbon dioxide.

This system isimportantbecause it sendsthe oxygen to themuscles. To sendthis oxygen themost importantstructure is theheart.

The heart is a special muscle that

sends the xygen to the muscles

through the blood.

The blood travels from the heart to the

muscles through the arteries and

capillaries and comes back to the heart

through the capillaries and veins.

When the blood goes from the heart to the

muscles it has oxygen and nutrients and

when it comes back to the heart from the

muscles it has carbon dioxide and rubish.

NERVOUS SYSTEM:

SENDS THE ORDER OF

MOVEMENT.

LOCOMOTOR SYSTEM:

PRODUCES THE

MOVEMENT.

CARDIORESPIRATORY SYSTEM:

GIVES THE ENERGY

FOR THE MOVEMENT

(ATP).

Here you have some videos that are

usefull for you to understand this unit.

These videos have much more information

than you need for the exam.

http://www.youtube.com/watch?v=1-wsFt2UmoM

http://www.youtube.com/watch?v=uPFHH2U5F2A

http://www.youtube.com/watch?v=TsdnDXF0qes

Consejo para el examen:

• No aprender de memoria las diapositivas (solo las

de músculos, huesos y articulaciones). Leerlas,

entenderlas y si tenéis alguna duda mandarme un

email y os las resolveré.