Body Organization

Body Organization

Open Ended

Describe the general organization of the human body.

​Explanation

​The body is organized into 11 (or 12, depending on your source) different organ systems, each with specific functions. Each organ system is made up of organs, which are made of tissues. Tissues are made of cells.

Vocabulary Review​

​Atoms

- Smallest unit of matter

​

​- All matter (which is anything that has mass and takes up space) is made of atoms

​

Multiple Select

Which ones are made of atoms?  Mark all that apply.

​Molecules

​Molecules are groups of atoms bonded together.

Multiple Select

Which ones are made of molecules?  Mark all that apply.

​Cells

​The basic unit of structure and function in living things

Multiple Select

Which ones are made of cells?  Mark all that apply.

​Tissues

​A group of similar cells that perform the same function.

Multiple Select

Which ones have tissues?  Mark all that apply.

​Explanation

​Plants and animals both have tissues - groups of similar cells that perform the same function.

​Examples of Tissues in the Human Body

Multiple Select

Which ones have organs?  Mark all that apply.

​Explanation

​Both plants and animals have organs - a collection of tissues that carry out a specialized function.

Multiple Choice

Humans have nearly 80 different kinds of organs. Each organ serves a specialized purpose in the body. For example, the brain serves as the control center of the body. What do eukaryotic single-celled organisms have that serve the same purpose as organs?

• particles

• molecules

• organelles

• tissues

​Explanation

• The correct answer is “organelles.” In eukaryotic cells, organelles carry out functions similar to the role of organs in a more complex organism.

• Everything in a cell is made of molecules, but they must be organized into organelles to carry out cell functions.

• Tissues are groups of similar cells, so they could not be inside a single cell.

Multiple Select

The mesentery (MESS un tayr ee) is a structure that connects the loops of the small intestine. The mesentery binds the intestine together so that it can’t get tangled or twisted. The mesentery also carries blood, nerve signals, and lymph fluids to and from the intestine.  Scientists recently classified the mesentery as an organ. What must be true if the mesentery is an organ? Choose the three statements that apply.

• It is part of an organ system.

• It has a specific function in the body.

• It is composed of different kinds of tissues.

• It is found in every type of multicellular organism.

• It is a group of similar cells that carry out the same function.

​Explanation

• All organs have a specific function, are composed of different kinds of tissues, and form part of an organ system.

• Different kinds of multicellular organisms have different collections of organs, depending on their needs.

  • For example, birds have feathers that keep them warm and help them fly.

• A group of cells that carry out the same function would make a tissue, just one part of an organ.

Multiple Select

An organ system is group of organs that work together to perform a specific function.  Which of these is an organ system?

​Organ System

​A group of organs that work together to perform a specific function.

Poll

How do you feel about today's lesson?

Open Ended

What questions do you have?