unit 4
TRANSCRIPT
natural
Teacher: Merche
What happens to our bodies when we do sport?
We inhale and exhale more air.
Blood flows fast around our bodies.
What do the senses do?
All the senses give information to the brain.
Sight
Taste
HearingSmell
Touch
The organ of touch is the skin. We use our skin to identify is hot or cold,
hard or soft, smooth or rough.
Our five senses: touch
The organ of taste is the tongue. We use our tongue to identify different flavours.
Our five senses: Tongue
The organs of sight are the eyes. We use our eyes to identify color, shape, size…
Our five senses: Sight
The organ of smell is the nose. We use our noses to indentity different smells.
Our five senses: smell
The organ of hearing are the ears. We use our ears to identify loud, quiet…
Our five senses: hearing
The nervous system is made up of the brain, the spinal cord and the nerves.
NERVOUS SYSTEM
FUNTIONS:
It controls everything.
It receives messages from nerves
It gives instructions to the nerves.
NERVOUS SYSTEM
BRAIN
NERVOUS SYSTEM
NERVES
The nerves are connected to the brain by the spinal cord.
SPINAL CORD
We use our locomotor system moves our body, eat and speak.
LOCOMOTOR SYSTEM
• Our locomotor system is made up of bones, joints, muscles and tendons.
LOCOMOTOR SYSTEM
Funtions:•We can move some of them (example, arms and legs)•Other muscles move automatically (example, the heart)
LOCOMOTOR SYSTEM
Muscles are elastic and flexible
Funtions:•Bones make up the skeleton.•They support the body.•They protect the organs: heart, lungs and brain.
LOCOMOTOR SYSTEM
Bones are hard and rigid.
The hip and the knee are joins
LOCOMOTOR SYSTEM
Joins: two o more bones meet.
When a muscle contracts it pull on the bone
LOCOMOTOR SYSTEM
Tendons attach muscles to the bones.
How can we look after our locomotor system?
• We can warm up before doing sport
• Stretch after doing exercise.
• We can sleep 10 hours every day.
We should doWe should do
• Eat food with calcium
How can we look after our locomotor system?
• Sit with bad posture
• Carry heavy things.
We shouldn´t do
We shouldn´t do
How does our circulatory system work?
It’s made up of the heart, the blood and the blood vessels.
It carries nutrients from the food and oxygen from the air.
Our circulatory system is a transport system
CIRCULATORY SYSTEM
It’s made up of the heart, the blood and the blood vessels.
Heart Blood Blood Vessels
Blood: is a red liquid that goes around the body.
2 process:
CIRCULATORY SYSTEM
Pick up/collect nutrient and oxygen
Drop off carbon dioxide and waste products
Blood travels in thin tubes called blood vessels
Heart is a muscle.
CIRCULATORY SYSTEM
It is in the middle of the chest.
It pumps/beats blood to every part of the body.
If we run our heart beats faster
If we have a rest our heart beats slower
CIRCULATORY SYSTEM
What’s the pulse?
A person’s heartbeat changes when they do any activity.
The pulse is the small thump you can feel in some parts of the body.
How does our respiratory system work?
It helps us breathe in oxygen and breathe out carbon dioxide.
It’s made up of the nostrils, the windpipe, the bronchi and the lungs.
The oxygen enters and the carbón dioxide leaves.
RESPIRATORY SYSTEM
a) Nose: The nose has two holes called nostrils. b)Windpipe: is a tube that divides into two smaller tubes called bronchi. c)Lungs: are two sacks that are protected by our ribs.
It’s made up of the nostrils, the windpipe, the bronchi and the lungs.
RESPIRATORY SYSTEM
PROCESS:
1)The air enters our nose (the nose warms the air and the hairs clean it).
1)The air goes down the windpipe and the bronchi into the two lungs.
Windpipe
Bronchi
Lungs
RESPIRATORY SYSTEM
PROCESS:
3) In the lungs, the oxygen passes from the air into the blood
4) The carbon dioxide passes from the blood into the air.
5) The carbon dioxide leave our body when we breathe out.
Carbon dioxide
Oxygen
• https://www.youtube.com/watch?v=pO10bTYa5R8
• https://www.youtube.com/watch?v=8QOObtVlyRI
REPRODUCTIVE SYSTEM
Men and women have different reproductive systems.
The reproductive system allows us to have babies.
REPRODUCTIVE SYSTEM
What’s the reproductive system?
FEMALE REPRODUCTIVE
The eggs are kept in the ovaries.
MALE REPRODUCTIVE
The sperm are kept in the testicles.
https://www.youtube.com/watch?v=tFZeyFbBLXE
Men have testicles and sperm. Women have eggs and ovaries.
PROCESS:
1) A sperm fertilises an egg from the woman.
2) The fertilised egg goes to the uterus.
3) It changes into an embryo.
4) The embryo grows bigger and bigger.
5) Nine monts later a baby is born.
What have we learnt?
senses nervous system
circulatory system
Our bodies work using our…
respiratory system
locomotor system
reproductive system
What have we learnt?
sight touch taste
There are five senses…
smell hearing