There are also three kinds of structures found in plant cells and not in animal cells. 1  cells have. ; 2  animal cells do not. 3  As noted in the description of the prokaryotic cell wall, the cell must also have a plasma membrane. 4  Plant cells have cell walls in addition to plasma membranes, not instead of plasma membranes. The. 2  for a eukaryotic cell is the same kind of structure, and has the same function as the plasma membrane of a prokaryotic cell. ( 3 ER) is a system of membrane-enclosed channels which ramifies throughout the cytoplasm of the cell. 4  It comes in two types--smooth and rough.
Â· just now. Report Abuse. Donated blood lasts for around 35 days as whole blood collected into a bag with anticoagulant and additives which help keep the blood cells alive (dextrose, phosphate and citrate). Plasma that is separated off can be frozen (at minimum -25 degrees Celcius) and kept for one year.
What doctors know is that stored cord blood will remain effective for more than ten years once cryopreserved. New data supports the controlled rate freezing methods that most accredited cord blood banks currently use. Controlled rate freezing allows the blood to be cooled and frozen gradually to protect the integrity of the blood sample. Once the sample reaches â 196 itâs known that as long as the blood sample stays at this temperature with no variance that the blood sample is likely to remain intact and highly effective for more than ten years.