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HP - UNIT 1 - INTERACTION

Antonio Rodriguez Al

Created on August 29, 2020

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Look at the parts of the body below. Which are associated with the function of interaction? Make a list in your notebook.

UNIT 1

brain

hair

eye

kidneys

nose

lungs

muscles

INTERACTION FUNCTION

skin

stomach

skeleton

THREE VITAL FUNCTIONS

HUMANBODY

NUTRITION

REPRODUCTION

INTERACTION

involves

Sensory System

Nervous System

Locomotor System

ENTER CODE

A _________ is a cell that sends messages to and from your brain

organism

neuron

taste bud

tissue

spinal cord

organ

ENTER CODE

An _________ is a living thing, such as a person, animal or plant.

organism

neuron

taste bud

organ

spinal cord

tissue

ENTER CODE

Cells with similar structures and functions form __________.

organism

neuron

taste bud

tissue

spinal cord

organ

ENTER CODE

An __________ is a part of your body that performs a specific function.

organism

neuron

taste bud

organ

tissue

spinal cord

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UNLOCKED

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THREE VITAL FUNCTIONS

HUMANBODY

REPRODUCTION

NUTRITION

INTERACTION

involves

Sensory System

Nervous System

Locomotor System

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Sensory System

Our sense organs detect information and send electrical signals to the brain.The brain interprets the signals and then decides how to react to the stimulus.

SIGHT

HEARING

SMELL

The senses

TOUCH

TASTE

Sight

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Sight

Light passes through the cornea and enters the eye through the pupil.

ORGAN: Eyes

PROCESS:

The iris controls the size of the pupil and the amount of light that enters the eye.

The lens focuses the light on the retina.

The retina sends electrical signals to the optic nerve. From there, the signals are carried to the brain.

Hearing

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Hearing

ORGAN: Ears

Sound waves enter the outer ear. They go into the auditory canal and they make the eardrum vibrate.

PROCESS:

The cochlea detects sound vibrations in the ossicles (three small bones) and it produces electrical signals.

The auditory nerve carries the electrical signal to the brain.

Smell

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Smell

ORGAN: Nose

Chemical particles in the air enter the nose through the nostrils.

PROCESS:

The chemical particles are detected by nerve receptors inside the nose.

The nerve receptors send electrical signals to the olfactory bulb in the brain.

Taste

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Taste

ORGAN: Tongue

Food touches the tongue, wich is covered with taste buds.

PROCESS:

The taste buds have receptor cells that detect tastes.

Electrical signals are carried to the brain by gustatory nerves.

Touch

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Touch

ORGAN: Skin

The skin covers and protects your body. The top layer is the epidermis and the middle layer is the dermis.

PROCESS:

The dermis contains nerves. These nerves detect heat, pressure and texture.

The nerves send electrical signals to the brain.

Nervous System

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The nervous system carries messages between the brain and other systems of the body.

Cerebrum

Brain

Cerebellum

CentralNervous System

Brain stem

Spinal Cord

The Nervous System

Sensory neurons

PeripheralNervous System

Motor neurons

Central Nervous System

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Brain

SpinalCord

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Peripheral Nervous System

Types of neurons

The peripheral nervous system is made up of nerves.

These nerves are made up of tiny cells called neurons that transmits electrical signals.

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SENSORYSYSTEM

Sensory neurons

Brain

Motor neurons

LOCOMOTOR SYSTEM

Locomotor System

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The signals from the brain travel through the nervous system to our muscles and they move our bones and joints. All these parts together form the locomotor system.

The Skeleton

Muscles

The Skeleton

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The skeleton has 206 bones that are connected by joints.

SHORTBONES

FIXED

BONES

JOINTS

FLAT BONES

SEMI-FLEXIBLE

LONGBONES

FLEXIBLE

The Skeleton

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The skeleton has 206 bones that are connected by joints.

Bones

Joints

Short bones provide stability and support.

Fixed: Do not move

Long bones are found in arms and legs.

Semi-flexible: Allow some movement.

Flat bones protect our internal organs.

Flexible: Allow much more movement.

Click on the pictures to find out more information.

In this unit we are not going to learn all of them!

Muscles

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The human body has more than 600 muscles. The nervous system controls these muscles. There are three types of muscles.

Skeletal muscles are joined to bones by tendoms. They are voluntary muscles, we can control them.

Smooth muscles are found in organs like the stomach. They are involuntary muscles.

Cardiac muscles make the heart move and beat. They are involuntary muscles.