Cells, Tissues, Organs: Flashcards

Questions and Answers

What is a cell?

The basic unit of all life/living things

What is tissue?

A group of cells that works together to carry out a particular task in an organism

What is an organ?

A group of tissues that performs a complex function in a body

What is an organ system?

A group of organs that together perform a function that helps the body meet its needs for energy & materials Signup and view all the answers

What is an organism?

Any individual living thing Signup and view all the answers

What is homeostasis?

The ability of an organism's internal systems to maintain a normal balance Signup and view all the answers

What does the skeletal system do?

Protects and supports body organs and provides a framework the muscles use to support movement. Signup and view all the answers

What does the muscular system do?

Allows all vital organs to function and allows movement Signup and view all the answers

What is the function of the digestive system?

Breaks down food to bring it to the bloodstream, where it is transferred as nutrients Signup and view all the answers

What does the circulatory system do?

Transfers blood and fluid through the body Signup and view all the answers

What is the purpose of the excretory system?

Gets rid of the body's waste Signup and view all the answers

What does the respiratory system allow?

Breathing for oxygen and release of carbon dioxide Signup and view all the answers

What is the nervous system?

The fast-acting control system of the body, responding to internal and external changes by activating appropriate muscles and glands Signup and view all the answers

What does the endocrine system control?

Controls hormones and reproduction Signup and view all the answers

What is the immune system responsible for?

Protects from foreign bodies such as viruses, bacteria, and germs Signup and view all the answers

What are involuntary muscles?

Muscles that aren't under your conscious control Signup and view all the answers

What are voluntary muscles?

Muscles under your conscious control Signup and view all the answers

What is smooth muscle?

Muscle tissue that layers most of your internal organs, reacts slowly and tires slowly Signup and view all the answers

What is cardiac muscle?

This tissue is only found in your heart, reacts slowly and tires slowly Signup and view all the answers

What is skeletal muscle?

Muscle tissue that is connected to bones and joints through tendons and ligaments, reacts quickly and tires quickly Signup and view all the answers

Study Notes

Basic Biological Units

Cell: Fundamental unit of life, comprising all living organisms.
Tissue: Cohesive group of cells performing specific functions.

Organ Structures

Organ: Assembly of tissues working together for complex bodily functions.
Organ System: Collection of organs collaborating to fulfill overall physiological needs.

Living Organisms

Organism: An individual, self-sustaining living entity.

Homeostasis

Homeostasis: Mechanism by which organisms regulate their internal environment to maintain stability.

Human Body Systems

Skeletal System: Composed of bones and joints; protects organs and facilitates movement.
Muscular System: Enables organ function and bodily movement.

Nutritional and Blood Systems

Digestive System: Breaks down food for nutrient absorption into the bloodstream.
Circulatory System: Responsible for the transport of blood and fluids throughout the body.

Waste and Gas Exchange

Excretory System: Eliminates bodily waste products.
Respiratory System: Facilitates gas exchange; intake of oxygen and expulsion of carbon dioxide.

Regulatory Systems

Nervous System: Fast-acting control system managing responses to stimuli via muscles and glands.
Endocrine System: Regulates hormone production and reproductive functions.

Defense Mechanism

Immune System: Protects the body against pathogens like viruses and bacteria.

Muscle Types

Involuntary Muscles: Muscles operating without conscious control, essential for automatic functions.
Voluntary Muscle: Muscles controlled consciously, allowing for deliberate movement.

Muscle Tissue Types

Smooth Muscle: Forms the walls of internal organs; characterized by slow reaction and endurance.
Cardiac Muscle: Unique to the heart, exhibiting slow reaction and sustained endurance.
Skeletal Muscle: Attaches to bones, known for quick reactions but rapid fatigue.

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Description

Test your knowledge on the basic building blocks of life with these flashcards covering cells, tissues, organs, and organ systems. Each card presents key definitions and concepts that are essential to understanding biological organization.