Structure, Movement, and Control

Structure and Movement

The Skeletal System

The body is able to move because of the skeletal system and muscular system.

The skeletal system has 4 jobs- protects internal organs, provides support, helps the body move, and stores minerals

Calcium is stored in bones and calcium is used for many uses and muscles and the nervous system needs it

Bones help you stand up and not look like a bean bag. They give you support.

Your bones also help protect your softer tissue like how your skull protects your brain

The muscular system and skeleton system work together so you can move. Bones that are attached to muscle can move

Compact bone-the hard outer layer of bone

Spongy bone-is the interior region of bone that contains many tiny holes

The Muscular System

Without muscle cells you wouldn't be able to do a lot of things like talk

About 1/2 of our body weight is muscle cells

The three different types of muscles are cardiac muscle, skeletal muscle, and smooth muscle that work in different ways

The heart is the only place that has cardiac muscle

Smooth muscles transport things in your body

Control and Coordination

The nervous system helps maintain homeostatis

The Nervous System

The nervous system can receive information, process it, and respond to it in less than one second

Neurons-basic units of the nervous system

There are two different type of nervous system- the central and peripheral nervous system.

Information firsts goes to the peripheral nervous system then the central nervous system for processing

The nervous system can automatically do functions like breathing

Walking is not automatic and you need to think about doing them

Reflexes-automatic movements in response to a signal

Your sense of touch makes it so that when you burn yourself you reflex to move away from the hot surface.

The Endocrine System

Hormones-chemical signals released by the organs of the endocrine system

Hormones take longer to travel than the nervous system, but hormones last longer

In order for you to grow it takes many systems one of them being growth hormone