it is called a vacuole
Lysosomes
In the pulmonary system, the Alveoli are the small sacs at the end of the bronchioles which are connected to the bronchus. It is within these sacs that gas exchange occurs.
Little sacs called alvioli-- in the lungs.
The air sacks which provide the surface through which gas exchange occurs are called alveoli.
In a chloroplast, the stacks of membranous sacs are called thylakoid membranes. Grana is the term used to refer to the stacks of thylakoids. It is in this internal part of the chloroplast where photosynthesis occurs.
The tiny sacs in our lungs are called 'alveoli' which is what makes gas exchange possible.
Simply put, the gas exchange occurs in the lungs. More specifically, the blood exchange occurs at the avoli, the "air sacs" in the lungs where the surrounding capillaries can be oxygenated.
Egg sacs for sharks are called well, egg sacs. However, baby sharks that come OUT of the egg sacs are called pups. Is that what you were trying to ask? If not, I hope I answered your question well enough.
The organelles where photosynthesis occurs are called Chloroplasts. Occuring only in plants, chloroplasts are small vesicle-like organelles that contain sacs of the pigment Chlorophyll. These sacs absorb sunlight to initiate the chemical reaction photosynthesis.
Alveoli
The chloroplast has individual sacs called thylakoids, which are arranged in stacks called the grana
alveoli. they are the basic functional unit of the lungs. it is where gas exchange occurs.
The gas exchange between carbon dioxide and oxygen occurs.