Cells/Body Systems

5.L.1 Understand how structures and systems of organisms (to include the human body) perform functions necessary for life.

5.L.1.1 Explain why some organisms are capable of surviving as a single cell while others require many cells that are specialized to survive.

5.L.1.2 Compare the major systems of the human body (digestive, respiratory, circulatory, muscular, skeletal, and cardiovascular) in terms of their functions necessary for life.

Vocab:

Unicellular: a one-celled organism

Multicellular: an organism with more than one cell

Transport system: a way of moving materials around the body (BLOOD!)

Microscope: a tool for seeing small things

Cardiovascular system: the body system that pumps blood with oxygen and nutrients

Circulatory system: the body system that pumps blood with oxygen and nutrients

Heart: an organ that pumps blood

Blood: a liquid that TRANSPORTS oxygen and nutrients around the body

Vessels: tubes that blood moves through

Respiratory system: the system in the body for moving gases like carbon dioxide and oxygen

Nose: an organ used for breathing in oxygen and breathing out carbon dioxide

Trachea: a tube for breathing

Lungs: an organ used for moving oxygen into the body and carbon dioxide out of the body

Skeletal system: the body system made of bones that provides support

Bones: organs that give us structure and support

Muscular system: the body system that allows us to move

Muscles: organs that contract to move our body

Digestive system: the body system that breaks down food into nutrients

Mouth: an organ that starts to break down food

Esophagus: a tube that moves food from the mouth to the stomach

Stomach: an organ that stores food for digestion

Intestines: organs that break down food into nutrients