Blood is a fluid connective tissue that performs many functions in the body. It carries oxygen and nutrients to the cells, hormones (chemical messengers) to the tissues, and waste products to organs that remove them from the body.
A wash bottle is a squeeze bottle with a nozzle, used to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks. Wash bottles using in laboratories. Wash bottles are sealed with a screw-top lid.
A washer used to obtain a 'finished' look. Usually used with oval head screws. Split Lock. The most common style of washer used to prevent nuts and bolts from backing out. External Tooth Lock. A washer with external 'teeth' Used to prevent nuts and bolts from backing out. Internal Tooth Lock. A washer with internal 'teeth' Used to prevent nuts and bolts from backing out.