Lesson 1 Levels of Organization in Organisms

Maura is studying the levels of structural organization of an animal’s body. Which level would describe a monkey's ear?

Choose the correct answer.

• organ

• tissue

• organism

• organ system

Veins are blood vessels that transport blood and nutrients throughout the body. What level of organization is a vein?

• cell

• tissue

• organ

• organ system

Which of these should the student write as an example of the organism level of organization?

• food, air and water

• kidney

• lion

• connective tissue

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What level or organization falls between the cell and an organ?

what level of organization falls between organ system and tissue?

Which statement best explains the relationship between structure and function in an organism?

• Structure and function refers to the jobs of tissues, organs, and organ systems.

• Structure and function refers to the different tissue types within an organism.

• Structure and function refers to the relationship between the parts of cells, tissues, organs, and organ systems and the job they do in the body.

• Structure and function refers to the relationships between the locations of tissues, organs, and organ systems.

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Erik bites into a sandwich, then chews and swallows the food. Which of Erik’s organ systems work together to perform the function of biting, chewing, and swallowing the sandwich?

• digestive

• excretory, digestive and muscular

• excretory and respiratory

• circulatory, digestive and nervous

The picture shows a human kidney. A kidney is made of different types of cells, each of which play a different role while working together. What level of organization does the kidney represent?

• organ

• tissue

• organism

• organ system

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What organ systems allow a person to ride a bike

• muscular and digestive

• digestive and excretory

• skeletal and digestive

• muscular and skeletal

Muscle cells are organized into flexible fibers because muscle tissue elongates and

• absorbs

• protects

• contracts

• stops working

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