Cuales son las caracteristicas y organos q desarrolla el embrion y el feto por trimestre

nucleus

would be most reasonable answer tbh

bru what tyep of qus is dis

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.