A single layer of cube-like cells that carry out active transport, facilitated diffusion, or secretion. They are found in mitochondria and kidneys. They often have cilia and microvilli on the surface.
credit definition The ability to obtain goods, money, or services in return for a promise to pay at some later date. The New Dictionary of Cultural Literacy, Third Edition
What is a 'Credit Card'. A credit card is a card issued by a financial company giving the holder an option to borrow funds, usually at point of sale. Credit cards charge interest and are primarily used for short-term financing.