The Muscular/ Skeletal The Muscular/ Skeletal SystemSystem

By: Grace Van BurenBy: Grace Van Buren

What are bones made of?What are bones made of?

Bones are made of calcium, phosphorous and Bones are made of calcium, phosphorous and collagen.collagen.

What are the 4 layers of the bone?What are the 4 layers of the bone?

The first layer of the The first layer of the bone is periosteum. bone is periosteum. The next layer is the The next layer is the compact layer.compact layer.Inside the compact Inside the compact layer there is a lot of layer there is a lot of cancellous.cancellous.The cancellous The cancellous protects the bone protects the bone marrow.marrow.

What is a skeleton?What is a skeleton?

A skeleton is a bony framework that holds 206 A skeleton is a bony framework that holds 206 bones.bones.

What is the scientific name for a rib What is the scientific name for a rib cage?cage?

The scientific name for a rib cage is a The scientific name for a rib cage is a thorax. thorax. The thorax also protects the heart, lungs, The thorax also protects the heart, lungs, and the digestive system.and the digestive system.

What is cartilage? What is cartilage?

Cartilage is a soft Cartilage is a soft tissue on the end of tissue on the end of your nose and ears!your nose and ears!

Where are about half of the bones Where are about half of the bones in your body?in your body?

You won’t believe it, but half of the bones in your body are You won’t believe it, but half of the bones in your body are in your hands and feet!in your hands and feet!

Your hands have 54 bones!Your hands have 54 bones!

Your feet have 52 bones!Your feet have 52 bones!

What happens when a muscle What happens when a muscle relaxes and contracts?relaxes and contracts?

When a muscle When a muscle contracts it becomes contracts it becomes shorter and fatter.shorter and fatter.When a muscle When a muscle relaxes it gets longer relaxes it gets longer and thinner.and thinner.

Fun FactsFun Facts

Muscles are 2/5 of our body weight.Muscles are 2/5 of our body weight.

Muscles always pull never push.Muscles always pull never push.

Muscles only get bigger after 24 to 48 Muscles only get bigger after 24 to 48 hours after a work out.hours after a work out.

The EndThe End