The Human Body

Muscles Cardiac Voluntary Muscle

Involuntary Muscle

Bone Marrow

Skeletal Cranium Compact Bone

Spongy Bone

Ligaments Tendon Cartilage

Vertebrae Brain X Ray Interesting Facts

Muscles

• Many of these are attached to bones and help you to move.

Cardiac

• The heart is this kind of muscle.

• This muscle never gets tired or sore like your leg muscles do.

• It is an involuntary muscle that controls the heart.

Voluntary Muscles

• You can contract and relax this in order to move body parts.

• Another name for Skeletal Muscles

• Flexing your biceps, chewing, running, and jumping are examples of this.

Skeletal

• This system is made up of over 22 bones!

• This system provides the framework for your body.

• We are born with 300 bones.

What is the Skeletal System?

• The Skeletal System is all of our bones

• It is the frame of our body

• Without bones, we would be floppy

• Some bones protect our fragile insides. Our skull protects our brain and our ribs protect our lungs, heart, and other insides

How Many Bones Do Humans Have?

• Humans are born with 300 bones

• As we grow our bones fuse, or grow together

• Adults have 206 bones

Are Bones Alive?

• Yes!

• Bones are made of hard stuff for strength and living cells to help them grow and repair themselves

How Do Bones Move?• Bones need muscles to help them move

• Joints are the place where two bones meet allowing them to move

• Our elbows, shoulders, knees, neck, and hips are joints

Cranium

• This is the part of the skull that protects your brain.

• It is the top part of your skull.

Bone Marrow

• This is where red blood cells are made.

• This is a soft jelly-like material that fills the inside of our bones.

Involuntary Muscles

• These are muscles that we do not control.

• Breathing

• This kind of muscle is also called a smooth muscle.

Compact Bone

• This is the hard outer part of the bone.

Spongy Bone

• The inner part of the bone

Ligaments

• These connect bones to other bones

• These connect one vertebrae to another

Tendon

• This connects muscles to bones

• This is the part that is named after Achilles

Cartilage• This is like a shock absorber for our bones

• This is what cushions the bones in your spinal column

• This is what the tip of your nose is made of

Vertebrae• There are 24

stacked on top of one another to make up the spinal column

• They are smaller in your neck than in your back

• There is one fused together in your spinal column called your tail bone

The Brain

• The brain is made up of the cerebrum, cerebellum, and medulla.

• The largest part of the brain is the cerebrum.

• The medulla is connected to our spinal cord. It controls blood circulation and breathing.

• The cerebellum controls our balance and posture.

X-Rays

• X-rays are special pictures of our skeletal system.

• These pictures help us to see the inside frame of our bodies.

Did you know that…..

• Say cheese! When you smile, you use 17 muscles!

• Your stomach digest about 2, 190 quarts of food each year. That’s around 8,760 bowls of spaghetti!

• If you could line up all of your blood vessels, they would wrap around the world 4 times!

• When you sneeze, air comes out of your lungs at over 100 miles per hour!

• Your brain weighs only about 3 pounds, but it can store billions of bits of information!