Body Organization

Body Organization

How is the Body Organized?

A cell is the smallest independently functioning unit of a living organism. Even bacteria, which are extremely small, independently-living organisms, have a cellular structure. Each bacterium is a single cell.

A human cell typically consists of flexible membranes that enclose cytoplasm, a water-based cellular fluid together with a variety of tiny functioning units called organelles. In humans, as in all organisms, cells perform all functions of life. A tissue is a group of many similar cells that work together to perform a specific function. An organ is an anatomically distinct structure of the body composed of two or more tissue types. Each organ performs one or more specific physiological functions. An organ system is a group of organs that work together to perform major functions or meet the needs of the body.

Multiple Choice

Patterns: What is the level of organization in the human body from the least to the most complex?

• cell-organ-tissue, organs system

• cells- tissue- organs- organ system

• organ system-organs- tissue- cells

Develop a Model

The body organization starts at the smallest operating thing and moves to higher functioning groups of cells that work together for one purpose. You need to compare the body organization to a city. Begin by thinking of the smallest things in a city that work together. Then larger groups, larger groups, and finally systems that work together to keep the city running.

Multiple Choice

If you are relating the levels of organization of the human body to the levels of organization of a city, what would you relate the cells to?

• bricks

• houses

• buildings

• roads

Multiple Choice

If you are relating the levels of organization of the human body to the levels of organization of a city, what would you relate the buildings to?

• organs

• organs systems

• cells

• tissue

Multiple Choice

If you are relating the levels of organization of the human body to a city, what would the city government be compared to?

• cells

• tissue

• organs

• organ systems

Systems and Models

The respiratory system exchanges oxygen and carbon dioxide between the air and cells in the body.

Watch the video and explain what is different from breathing and respiration?

Copy the link and paste it into your web browser to find the video.

https://www.youtube.com/watch?v=7qx6InhNHwY

Multiple Choice

You breathe out ________ and breathe in _____________.

• oxygen, carbon dioxide

• carbon dioxide, oxygen

Multiple Choice

Respiration is more than just breathing, there is a chemical reaction that takes place during respiration, what is it?

• oxygen breaks down glucose in the cells for energy

• there isn't one

• carbon dioxide breaks aparts the cells and the waste is water

• oxygen breaks down glucose in the cells for energy, water is the waste product

How can you tell that your Immune System is functioning well?

Multiple Choice

If you are sick all the time and it's hard to get to feeling better, You immune systems is?

• not working

• working, you just get sick sometimes

Multiple Choice

Power ups or things that help boost your immune system are?

• sleep, eating vegetables & balanced diet, exercise, getting fresh air

• sleep, eating, exercise, getting fresh air

• sleep, eating whatever you want, exercise, getting fresh air

If the brain is the control center of the body, why do we need nerves in our fingers?

Multiple Choice

If the brain is the control center of the body, why do we need nerves in our fingers?

• we don't

• the nerves in our fingers send a message to the brain, the brain then sends message on what to do

• the nerves in the fingers or hands are complex and we don't understand them or how they control the body

• the brain sends all the messages, we don't need nerves in our hands