Stroma
Where does the Calvin cycle occur?
Stroma is the supportive tissue or matrix of an organ, typically consisting of connective tissues and blood vessels. In biology, stroma refers to the supportive framework of many organs, including the kidneys, ovaries, and chloroplasts (organelles found in plant cells).
In chloroplasts, stroma is a semi-fluid medium that surrounds the thylakoid membranes. It contains enzymes required for photosynthesis, such as ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO). The stroma is also involved in the synthesis of starch, amino acids, and fatty acids.
In the kidney, stroma is composed of connective tissue that supports the functional units of the kidney, called nephrons. Blood vessels and lymphatic vessels also traverse the stroma of the kidney.
In the ovary, stroma is the supportive tissue that surrounds the ovarian follicles and is responsible for producing hormones like estrogen and progesterone.
In summary, stroma plays an important role in supporting the structure and function of various organs. It provides the tissue with nutrients and blood supply, while also aiding in organ-specific processes.
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