lungs
Lungs
By the alveoli
Alveoli
Alveoli
organs are made up of tissues, and tissues are made up of cells
organisms
The integumentary system is made up of the skin and its accessory organs.
A system made up of excretory organs is the urinary system.
Cells are made up of membranes, cytoplasm and organelles. Tissues are made up of Cells Organs are made up of Tissues Organs make up a System of Organs (Cardiovascular System,etc.) Systems make up Organisms
The alveoli
An organ system is made up of different organs that work together to perform specific functions in the body. Each organ in the system has a unique role that contributes to the overall function of the system.
cells make up tissues tissues make up organs organs make up body systems