The Skeletal System What Do We Already Know

The Skeletal System

What Do We Already Know? o What do you think makes up the skeletal system? o What other systems do you think we use with the skeletal system? o What are some of the functions of the skeletal system?

What Will We Learn Today? • • • Parts of the skeletal system Functions of the skeletal system Types of joints

Making the Connection • Continues Chicken Wing Demo • We use our skeletal systems every day (to play sports, walk down the hall, and just to stand up). • Math Connection – Most people’s height is equal to about 4 times the length of their femur (long leg bone).

Parts of the Skeletal System • Bones - most familiar part • Cartilage – spongy connective tissue ( ex. Move your nose and ears) • Ligaments – bands of connective tissue that hold bones together.

Functions of the Skeletal System • • Support – the big blob Protection – clumsy example Production of new blood cells – Gross!! Movement – working with muscles

Think About It • Why do you think plants do not have bones? • What kind of problems might humans have, if we didn’t have bones?

Three Types of Joints • Ball and Socket Joints • Gliding Joints • Hinge Joints

Ball and Socket Joints • Ball and socket joints, like your hips and shoulders, allow rotation and movement in many directions. • Make a fist model. • Move your shoulder joint.

Gliding Joints • Gliding joints, like the ones in your spine, allow side-to -side movement and back-and-forth movement. • ¼” shorter at night • Move your gliding joints.

Hinge Joints • Hinge joints, like your elbows and knees, only move back and forth. • Move your knee or elbow

Let’s Review • What are the parts of the skeletal system? • What are the functions of the skeletal system? • Describe three types of joints.