Butt
the thin-walled sacs in the lungs are the alveoli. they are tiny are sacks in your lungs.
the thin-walled sacs in the lungs are the alveoli. they are tiny are sacks in your lungs.
the thin-walled sacs in the lungs are the alveoli. they are tiny are sacks in your lungs.
They are called alveoli.
They are called alveoli.
When blood is pumped into the thin-walled blood vessels of the lungs, carbon dioxide is replaced with oxygen.
When blood is pumped into the thin-walled blood vessels of the lungs, carbon dioxide is replaced with oxygen.
frogs heart has five chambers namely. 1-Sinus Venosus =Thin walled 2-Right auricle =Thin walled 3-Left auricle =Thin walled 4-Ventricle =Thin walled and muscular 5-Truncus arteriosus =Tabular thick walled
They are called alveoli.
Alveoli
arteries
Atrium