Models and Human Systems

Models and Systems

​

What is a system? What is the surrounding?

A system: that part of the universe we wish to study.

The surroundings: the rest of the universe.

Open System

When both matter and energy can be exchanged, the system is called open

Closed system

• A closed system is a system that does not allow transfer of matter in or out of the system.

Isolated system

If a system is isolated, then nothing can enter or leave. Its energy and matter remain the same. Any changes go on inside the system, and since it is isolated, we cannot know anything about an isolated system from the outside.

Multiple Choice

What type of system is shown in the picture?

• Open

• Close

• Isolated

Multiple Choice

What type of system is shown in the picture?

• open

• close

• isolated

Multiple Select

Which of the following is an open system? Check all that apply.

Multiple Choice

What type of system is shown in the picture?

• open

• close

• isolated

FLEX! Today we are going to work out our brains but first FLEX your bicep.

What did you notice happened when you flexed?

Lung Function

The main function of the lungs is the process of gas exchange called respiration (or breathing). In respiration, oxygen from incoming air enters the blood, and carbon dioxide, a waste gas from the metabolism, leaves the blood.

Multiple Choice

For the lungs to accomplish its job it must expand and contract. What type of tissue must it be made of to allow it create this pressure?

• Neurons

• Marrow

• Muscle

• Epithelial

Poll

What system is this?

• Circulatory System

• Skeletal System

• Nervous System

Nervous System

Each sensory organ receives an external stimulus and delivers it to the brain

-Thermal energy, epithelial nerves (in the skin)

-Electromagnetic solar radiation, eye cells

-Chemical compounds, tongue receptors

-Sound waves, ears

-nasal hair cell nose

Poll

The brain has many functions! Which of the following is the brains functions?

*Hint* Don't work a nerve and get this wrong!

• To carry electrical signals to control muscle tissue

• To interpret sensory stimuli from the environment

• To process and record internal and external information

• To make decisions and output commands to control other systems

Circulatory System

• All of the previous options are correct!

• Blood moves in a cycle around the body

• Remember HACV (Heart, Arteries, Capillaries Veins)

• You can being at any place within this as long as you remain in order

Multiple Choice

What is the function of the kidney?

• Break food down into simple food structures

• Absorb nutrients into the blood

• To filter wastes from the blood

Multiple Select

What are the main functions of the skeletal system?

• gives the body its shape

• allows movement,

• makes blood cells,

• provides protection for organs

• stores minerals.

Body interactions

What systems interact with the immune system?