4.3 Working together Flashcards
Molecules
2 or more atoms joined together
Organelles
Small structure in a cell with a special function
Cells
THE smallest unit o life. Cells are the building blocks of living things.
Tissues
Group of cells performing the same function
Systems
Group of organs working together
Cellular respiration
THE chemical reaction involving oxygen that moves energy in the glucose
Respiratory system
Involving the lungs. Takes in air and supplies the blood.
Circulatory system
Circulates blood to all the cells of the body
Blood cells
Red and white blood cells
Blood vessels
Veins arteries and capillaries
Veins
Blood vessels that carry blood back to the heart
Endocrine system
THE body system of glands that produce and secrete hormones.
Musculoskeletal system
Consists of the skeletal muscles. Bones an joints
Nervous system
Messages are sent
Exrectory system
Body system removes wastes.
