Let's Compare Mucosa and Serosa. 1  MUCOSA VS.  Mucosa. The mucous membranes (or mucosae or mucosas; singular mucosa) are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion. mucosa \mucosa\ n.
Definition of dropper for English Language Learners. : a glass or plastic tube that is used to measure out liquids by drops.
Drop shipping is where: 1. A retailer or website owner takes an order for a product and the customer pays for it. 2. The retailer or website owner places the order with a wholesaler/supplier. 3. The supplier then sends the product directly to the customer. Advantages: