body systems

basic requirements for life

water

suitable temperature range

Nutrients

oxygen

waste removal

• = provided +maintained thru cooridnated system of body systems

HUmans

Human = complex multicellular organi mad of abt 37 trillion cells

• Survival = only possible if these structures communicate + coordinate their activities.

• multiceulluar = nervous system + endocrine system allow communication occur

cells to systems

tissue = group of similar cells working together to perform specific function

Organs: a group of tissues to perform a specific function

Organ System: a group of organs that work together as system to perform 1 or more functions

Digestive, circulatory, respirtoary how they connect

digestive system break down food into small molecules eg glucose + absorbs nutrients in small intestine.

•Nutrients move thru body in blood via circulatory system.

• The respiratory system brings oxygen into the body thru the lungs- circulatory system carries both oxygen + glucose in blood to all body cells.

Inside cells, oxygen + glucose = used to release energy thru cellular respiration. - energy is needed movement+growth+ repair. waste product of process = carbon dioxide, which transported by blood back to lungs + removed from body when breathe out