LIVING ORGANISMS VOCABULARY CELL Smallest unit of life

LIVING ORGANISMS VOCABULARY

CELL • Smallest unit of life • All living things are made up of cells

UNICELLULAR ORGANISM Organisms made up of one cell and carries out all of life's functions in the single cell

EXAMPLES OF UNICELLULAR • Amoeba • Bacterial Cell • Euglena • Paramecium

MULTICELLULAR ORGANISM Complex organism consisting of multiple cells • Plants • Humans • Animals, insects, etc.

CELL SPECIALIZATION • Cells having “special” jobs • Cells doing certain life functions to help an organism live

TISSUE • A group of similar cells that perform the same function

ORGAN • Collection of tissues that carry out specialized function of the body

ORGAN SYSTEM • Group of organs that work together to perform a job

EXTERNAL ENVIRONMENT Everything outside a unicellular or multicellular organism Example- the air around us is in our external environment

TRANSPORT SYSTEM A system that transports (moves) required substances around the body of an organism (things such as oxygen, carbon dioxide, blood, nutrients) All multicellular organisms NEED a transport system In humans the circulatory system is our transport system

CIRCULATORY SYSTEM Heart, Blood Vessels Function (job): Circulate blood through the body and transports nutrients, water, and oxygen to cells in the body

RESPIRATORY SYSTEM Nose, Trachea, Lungs • Function (job): Brings oxygen into our lungs and takes carbon dioxide out (gas exchange)

TRACHEA (TRAY-KEY-UH) • Tube that carries air to the lungs (windpipe)

LUNGS • Baglike organs that remove carbon dioxide from the body and bring oxygen to the blood • Part of the respiratory system

SKELETAL SYSTEM Bones • Function: Protection of organs from external shock, gives shape and support to the body, produces red blood cells

MUSCULAR SYSTEM Muscles • Function: Movement and helps with posture. Also helps the body maintain the right temperature.

DIGESTIVE SYSTEM Mouth, Esophagus, Stomach, Intestines • Function: Breaks down food into nutrients to go into the bloodstream and be used for energy

NERVOUS SYSTEM Brain, Spinal Cord, Nerves • Function: Control center of the body. Sends messages to other parts of the body for response