Х Parte A: Los
embriones de pollo,
ratón y humanos
pasan por una etapa
durante la cual tienen
hendiduras y arcos
en el cuello similares
a las hendiduras
branquiales y los
arcos branquiales de
los peces. Explique lo
que sugiere esta
evidencia sobre las
relaciones evolutivas.

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.

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.