A Body in Balance

Maintains constant body temperature

Maintains the level of glucose in the blood

Maintains the level of salt, water and sugar in the blood

C6H12O6

So…..

What do we call this maintenance of an internal environment?

Homeostasis

3 Major topicsin Maintaining

Balance

These 3 major topics are interrelated to help your body maintain homeostasis:

•Structure and function

•Division of labor

•Interdependence of organ systems

Structure and Function

TRY THIS! Put a rubber band around

your hand so that the thumb cannot be used. Pick up your textbook and hand it to the student next to you.

Pick up your pencil and write your name without using your thumb.

Structure and Function

Why are these harder to do without the thumb?

How is the structure of your thumb related to its function?

Structure and Function What is the function

of plant leaves?

Why are these leaves shaped differently?

Maple leaf

Conifer

Cactus

Structure and Function

The dolphin and the fish are unrelated organisms.

Why do they have similar structures?

Mammal - dolphin

Fish – Queen snapper

Structure and Function

Explain why structure is so important to function.

Division of Labor

Why do you need so many different parts to digest your food?

Division of Labor

What do your teeth do for you?

Division of Labor

Esophagus

Why do you need an esophagus?

Division of Labor

Does the stomach do anything special for you?

Division of Labor

Could you live without your small intestine?

Why?

Division of Labor

Your body systems are divided into different parts.

Each part has its own special function.

This is called a Division of Labor.

Interdependence of Body Systems

REMEMBER . . .

All the body systems work together to maintain homeostasis.

Interdependence of Body Systems

What systems need to work together in order for you to write your name on a sheet of paper?

Interdependence of Body Systems

What systems need to work together so you can get energy from the food you eat?

Interdependence of Body Systems

What would happen if you tried to move your leg with a broken femur?

What would happen if you had too few red blood cells?

Interdependence of Body Systems

All the body systems rely on each other in order to function correctly.

If one system fails to work, every system will be affected.

This shows the interdependence of all the systems.

Let’s review:

Explain homeostasis and why it is important.

Why is structure related to function?

What does division of labor mean?

Why is it important for all of your body systems to work together?