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The Skeletal System 6 th Grade

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Page 1: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

The Skeletal System

6th Grade

Page 2: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Are bones in your body alive? What are they made of?

• YES!• The bones in your body are alive – Made of tissues that have cells that take in

nutrients and use energy

Page 3: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Skeletal System is the FRAMEWORK of your body: What its 5 major functions?

Page 4: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Reason #1:

• Gives SHAPE and SUPPORT to your body

Page 5: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Reason #2:

• PROTECT your internal organs– Ex. skull protects your brain – Ex. ribs surround the heart and lungs

Page 6: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Reason #3:

• Muscles are attached to the bone and help bones move

Page 7: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Reason #4:

• Blood cells are formed in the center of many bones in soft tissue called RED MARROW

Page 8: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Reason #5:

• Large quantities of CALCIUM and PHOSPHORUS are stored in the skeleton for later use these make bones hard

Page 9: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Are bones smooth or rough?

• Rough: have bumps, edges, round ends, rough spots, many pits and holes

Page 10: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Periosteum

• A living bone’s surface covered with a tight-fitting membrane

Page 11: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Under the periosteum, what are the 2 types of bone tissue?

• Compact Bone Tissue:

• Spongy Bone Tissue:

Page 12: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Compact Bone Tissue

– HARD structure that gives bones strength– Contains deposits of calcium and phosphorus– Bone cells and blood vessels are found in this layer--keeps the bone from being too rigid, brittle or easy to break--even though it is hard, it is still ALIVE

Page 13: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Spongy Bone Tissue

• Located at the end of long bones

• Has many small open spaces to make your bones lightweight

Page 14: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

What is in the center of long bones?

• Large openings called CAVITIES

Page 15: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

The cavities and spaces in spongy bone are filled with MARROW

– Yellow marrow: composed of fat cells– Red marrow: produces red blood cells at a rate of

2-3 million cells per SECOND

Page 16: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Red vs. Yellow Bone Marrow

Page 17: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

What is cartilage?

Page 18: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

What is Cartilage?

• A smooth, slippery, thick layer of tissue that covers the ends of bones

• Flexible, important to joints because it reduces friction so that bones to not rub together

• People with damaged cartilage have pain when they move

Page 19: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Cartilage

Page 20: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Cartilage

Page 21: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

How many bones does an adult have?

• 206

Page 22: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Bone Cells

• Osteoblasts: build up bone by depositing calcium and phosphorus to make them strong

• Osteoclasts: break bone down, releasing calcium and phosphorus into the bloodstream– Your body needs these elements to move your

muscles

Page 23: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

What are joints? What are ligaments?

• Joints: Any place where 2 or more bones come together they do not rub against each other

• Ligaments: a tough band of tissue that hold joints in place

Page 24: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

The joint is the place where the 2 bones come together, the cartilage is the layer of tissue between the bones, and the ligament is a tough layer and of tissue holding

the bones in place.

Page 25: The Skeletal System 6 th Grade. Are bones in your body alive? What are they made of? YES! The bones in your body are alive – Made of tissues that have

Ligaments vs. Tendons

• Ligaments connect BONE to BONE

• Tendons connect BONE to MUSCLE

https://www.youtube.com/watch?v=PdJ5QDkqG2g

https://www.youtube.com/watch?v=PdJ5QDkqG2g
https://www.youtube.com/watch?v=PdJ5QDkqG2g

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