How The Body Works

Eyes
Notes:

• An eye is about the same size as a ping pong ball
• The biggest part of the eye is the vitreous body which also gives the eye its shape
• Cones help us see color
• Rods help us see shades
• Cones and rods together help us see a full picture
• The colorful part of the eye is called the iris
• When we see an image and when it hits the retina the image is upside down and the brain flips the image
• The optic nerve is the great messenger at the back of the eye

Teeth 

Notes:

• Teeth don't only help you eat but they help you talk
• The white part of your tooth is called the crown
• Enamel is what covers the crown
• The dentin protects the pulp
• The pulp contains nerves which send messages to the brain
• Cementum is the thing that attaches the root of your tooth to the jawbone
• Canines are our pointy teeth
• The last four teeth we get are called our wisdom teeth
• Primary teeth are the teeth that babies have
• Molars are the teeth that help us grind our food

Bones

Notes:

• The stirrup is the smallest bone in your body
• Bones meet at joints
• Their are 206 bones in a adult human body
• Vertebrae is located in your spine
• The patella is in your knee
• Bone marrow is in the centre of your bone
• Your bones will stop growing around the age of 25
• There are 33 bones in your spine
• The skull bone protects your brain
• The rib cage protects your liver, lungs and heart