7th Grade Life Science Unit 3: Human Body Vocabulary

A collection of key vocabulary words and their definitions related to the Human Body for 7th Grade Life Science.

Cell

The basic unit of life on earth.

Tissue

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

Organ

A structure made up of different types of tissues that work together to perform a specific function.

Organ System

A group of organs that work together to perform a specific function or set of functions in the body.

Organism

An organism is a living individual that can carry out all the processes of life.

Digestive System

Responsible for breaking down food into nutrients that can be absorbed by the body.

Nervous System

Responsible for coordinating and controlling the body's activities.

Muscular System

Responsible for movement and locomotion.

Excretory System

Responsible for filtering waste products from the blood and eliminating them in the form of urine.

Circulatory/Cardiovascular System

Responsible for transporting oxygen, nutrients, hormones, and waste products throughout the body.

Respiratory System

Responsible for the exchange of oxygen and carbon dioxide between the body and the environment.

Immune System

Responsible for defending the body against pathogens, such as bacteria, viruses, and parasites.

Homeostasis

The maintenance of stable internal conditions.

Reproductive System

Responsible for the production of offspring.

Endocrine System

System responsible for producing and regulating hormones, which are chemical messengers that control various bodily functions.

Integumentary System

Provides protection against external threats, regulates body temperature, and helps with the excretion of waste products.

Lymphatic System

Helps maintain fluid balance and defend the body against infections.

Skeletal System

Provides support, protection, and movement for the body.