Epithelial tissue forms protective coverings and lining surfaces, which is exactly what’s described here. It covers the outside of the body—the skin’s outer layer—and lines the internal surfaces of organs and cavities such as the mouth, digestive tract, airways, and the walls of body cavities. This tissue is typically arranged as continuous sheets, is often avascular, and regenerates quickly. Its roles include protection, absorption, secretion, and filtration, and it comes in various shapes (squamous, cuboidal, columnar) and arrangements (simple or stratified), which fits the idea of both covering and lining. Connective tissue provides support and connection, muscle tissue contracts to produce movement, and nervous tissue transmits signals. None of these alone describes both covering outside and lining internal surfaces as epithelial tissue does.

Normal adult blood pressure is typically about systolic under 120 mm Hg and diastolic under 80 mm Hg. The reading 118/78 fits this range well, with a systolic of 118 and a diastolic of 78, both below the upper limits. The other numbers don’t sit as clearly in the normal zone: 140/90 shows high blood pressure (hypertension); 90/60 is on the low side for many adults; and 120/80 is at the upper edge of normal and can be considered borderline. So 118/78 is the reading that clearly lies within the normal adult range.

Converting time from 24-hour format to 12-hour format. In 24-hour time, hours run from 00 to 23. For afternoon times (13:00 and above), subtract 12 from the hour and add PM. If the hour is 12, it’s 12:xx PM (noon); if the hour is 00, it’s 12:xx AM (midnight). So 13:00 becomes 1:00 PM. The minutes stay the same, so 13:00 is 1:00 pm. The other options would represent different times: noon, early morning, or late night.

The main idea here is how anatomical planes slice the body. The plane that divides the body into equal left and right halves runs along the body's midline, giving two mirror-image sides. This is the midsagittal plane. It’s a specific sagittal plane located exactly at the center. In contrast, a frontal (coronal) plane cuts the body into front and back, and a transverse plane cuts into top and bottom. A sagittal plane in general divides left and right, but only the midsagittal plane yields equal halves.