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Human Body Systems

B

Bones are _________________ tissues, made of cells. They take in nutrients and use energy.

Bones are Alive

The skeletal system is made up of all the ____________ in your body.

Skeletal System

Give body ____________ and support

Protect your _________________ organs

They serves as an attachment point for ___________________, helping them to move.

Blood cells are made in the _________________ of bones

__________________ and phosphorous compounds are stored in bones for later use. They

also make bones hard.

Functions of Skeletal System

Bones are not ___________________.

They have bumps, edges, round ends, rough spots, and many pits and holes.

Muscles and ____________________ attach to the bumps and pits.

Blood vessels and _____________________ enter and leave through the holes.

Bone Structure

name: __________________

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PERIOSTEUM

Surface of bone is covered with a ___________________, tight-fitting membrane

Small blood vessels in periosteum carry ____________________ into the bone

____________ for growth and repair of bone are found here also Under the periosteum are two types of bone - ____________ bone and ___________ bone

Parts of Bone

COMPACT BONE

Directly under the periosteum.

Compact bone is hard and strong.

Gives bones strength.

Contains calcium and __________________.

Contains bone ____________ and blood vessels

It is living. It is keeps bones from being too _____________, brittle or easily broken.

SPONGY BONE

Located at the ______________ of your long bones, like our thigh and upper arm bone.

Have many small _____________________ to keep the bone lightweight

The centers of long bones have a large opening called a __________________.

These cavities are filled with __________________.

Marrow is also in openings of the spongy bone

__________________ marrow contains fat cells

__________________ marrow produces red blood cells

How long does it take to produce 2-3 million red blood cells? _____ seconds!

CARTILAGE

The ends of bones are covered with a smooth, slippery, thick layer of tissue called _________

Does ___ contain blood vessels or minerals

Flexible

Absorbs __________________ in joints

Makes movement easier, reduces __________________

Can be damaged

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Beginning skeleton was made of __________________.

It gradually broke down and was replaced by ___________.

__________________ (bone forming cells) deposited minerals calcium and phosphorus in the

bones, making the bone tissue hard. At birth you had ______ bones. You now have 206 bones.

How did you lose 94 bones?? Some __________________, or grew together.

Osteoblasts build up bone.

__________________ - break down bone tissue.

This is normal and healthy.

The osteoclasts release ______________ and phosphorus into the blood stream, which are

needed to keep your body working __________________, including moving your muscles.

Bone Formation

Any place where two or more __________________ come together

The bones are separated by cartilage and are held together by __________________.

Immovable Joints - ____________ and Pelvis

Pivot Joints - arm and ____________

Ball and Socket Joints - hip and shoul____________der

Hinge Joints - elbows, ____________ and fingers

Gliding Joint - wrists, ____________ and vertebrae

Joints