I want to know how many isolated rat pulmonary artery rings, I can get from a rat, for use in the organ bath. So how long is a rat's main pulmonery artery. Thank you.
Unless there's a powerful reason for not using other arteries, I would use the PA (pulmonary artery) but all other big arteries as well (aorta, carotid, femoral) in the first experiment to maximize the use of one animal life. - In the same experiment I'd measure the length of the PA as well as other arteries (take a picture of the dissection). In the second experiment, you are better positioned to focus on the PA artery rings, assuming all other rings are not useful. Besides pressure, are there other variables that make the PA unique for your investigation?