Gr. 7 Unit 1 Lessons 1-3 Human Body

Made up of heart, blood, & blood vessels, which transport blood around the body

Adults have approximately __of blood made up of four parts

2 small organs @ back of throat & tongue that help defend body against infection

Tissue that contracts & relaxes making movement possible; made up of proteins

Maintenance of a constant internal environment when outside conditions change

Part of the skeletal system where blood cells are produced

Muscle below the lungs

White blood cells fight pathogens with ____

Place where 2 or more bones are connected; allows movement of body parts; 2 types

Carries blood back to the heart

Involuntary, spindle-shaped, & found in internal organs & blood vessels

Muscle action you can control=______, one you CANNOT control =____

Body systems communicate thru 2 basic ways electrical & ____ messages

Largest lymphatic organ, which stores white blood cells & allows them to mature

The ___are tiny sacs in the lungs

Exercise when muscle cells use oxygen as they contract is said to be ____

Group of organs that work together

Group of organs & tissues that collect fluid leaked from blood & returns it to the blood

Tiniest blood vessels, allow exchanges between body cells & blood; connect other vessels

2 disorders of the Respiratory Sytem

Takes blood away from the heart; made of thick walls & smooth muscle

Small bean-shaped organs that remove pathogens & dead cells from lymph

Another word for breathing, in which oxygen is transported from outside the body to inside it

Voluntary, long, thin, striped shape that attaches to your bone & allows for movement

Connective tissue w/in the CV System that is a transportation system thru out body