Organisms with more than one cell

To serve a purpose or do a job

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

A group of tissues that join together to perform a specific job

A group of organs that work together

Cells that are similar in size and shape

The Circulatory System is also known as the cardiovascular system made up of the heart, blood, and blood cells.

To move around through a path or course

A structure in the body that temporarily closes to prevent passage of material or allow movement of a fluid in one direction

The part of the heart from which blood passes into the arteries.

One of the blood vessels that carry the blood back to the heart.

An organ whose job is to send blood around your body

The Aorta is the main artery that carries blood from the heart and passes it to one part of the body

One of the branching tubes that carry blood from the heart to all parts of the body

A blood vessel that connects arteries to veins

A Pulse is the beat that comes from the regular widening of an artery in the body as blood flows through it.

A blood vessel that connects the heart to the lungs

Blood is a substance in the body needed to keep us alive

A tube that carries blood in the circulatory system.

A type of blood cells that have the important job of carrying oxygen.

A type of blood cells that are part of the germ-fighting immune system.

The Respiratory System is an organ systems thats main job is to take in oxygen to the lungs and get rid of carbon dioxide and water

We don't need respiration in order to breathe.

A colorless odorless tasteless gas that is necessary for life; humans and animals breathe it in.

A gas that people and animals release when they breathe out

A stiff-walled tube of the respiratory system that connects the pharynx with the lungs

Baglike organs, or body parts, used for breathing that are part of the body's respiratory system.