stomata
stomata
this process occurs within dark green structures called
The air sacks which provide the surface through which gas exchange occurs are called alveoli.
The structure in the epidermis that gaseous exchange occurs in plants is through the stomata. A stomata is a tiny opening or pore in the epidermis.
veins
The dermal branchia is an extension of the body cavity through with oxygen consumption occurs--(gas exchange) The pedicellariae are picher or jawlike structures that clean debris off of seastar.
The gas occurs by simple diffusion through the cells.
Alveoli- these are the small sac-like structures where gas exchange occurs with the blood. Its creates an ideal site for gas exchange between the air in the lungs and the blood in the capillaries.
Gaseous exchange occurs through capillaries all over the body to bring oxygen to cells and remove carbon dioxide.
AlveoliThe aveoli are small sacks in the lungs. A membrane that lines these sacks allows oxygen to move to the blood and carbon dioxide to move from the blood.Alveoli are particular to the lungs of mammals. Different structures are involved in gas exchange in other vertebrates.Air travels down the trachea, through thr bronchioles towards the terminal end of the respiratory tract, the alveoli. It is In the pulmonary alveolus that gas exchange with the surrounding capillary beds occurs. It is worth noting that alveoli are solely mammalian structures, so resporatory gas exchange occurs differently in other vertebrates and invertebrates.alveoli
it occurs through the heart
Chloroplasts are found in mesophyll cells. Thylakoids are stackable chloroplast structures. They form stacks called grana in which photosynthesis occurs. .