what do elastic fibres do in arteries
Elastic arteries: These arteries that receive blood directly from the heart-the aorta and the pulmonary artery.: These need to be elastic because: They are relatively thin compared to their diameter.When the heart contracts, and ejects blood into these arteries, the walls need to stretch to accommodate the blood surge, storing energy.The arterial hydrostatic pressure that results from ventricular contraction is the 'systolic blood pressure' (systole is greek for contract).hese need to be elastic because: They are relatively thin compared to their diameter. When the heart contracts, and ejects blood into these arteries, the walls need to stretch to accommodate the blood surge, storing energy.