The technician carefully inspected the aperture membranes for any signs of wear before reassembling the device.

During the dissection, the anatomist carefully examined Zinn's membranes to determine their points of attachment.

When she was admitted to the hospital, the obstetrician confirmed a rupture of membranes and prepared for delivery.

The doctor examined the patient's tympanic membrane for signs of infection.

Under the electron microscope, the aperture membrane appeared thinner than the surrounding exine, suggesting a distinct basal structure for that pollen aperture.

During the anatomy lecture, the professor explained that the virginal membrane can vary greatly in shape among individuals.

The surgeon carefully removed the cyclitic membrane to restore the patient's vision.

Graduate students measured the membrane potentials of different neuron types under varying ionic conditions.

The herpetologist examined the frog's nictating membrane to assess its eye health.

Many marine animals, like seals and penguins, rely on nictating membranes to protect their eyes while swimming.