What is the carrying capacity of this ecosystem? 2.0
1.5
A
Population (millions)
1.0
0.5
1800
1825
1856
1875
1900
1925
Year

the sea slugs belong to the same class

"a.) well–developed vascular system."

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.