The mammary gland of the dairy cow is composed of millions of milk-producing alveoli, which convert blood components into protein, fat, and lactose.The gland is attached to the body by the median and lateral suspensory ligaments. Milk exits each mammary gland via a teat equipped with a teat canal.he mammary gland of the dairy cow is composed of millions of milk-producing alveoli, which convert blood components into protein, fat, and lactose.
Echolocation is the use of sound waves and echoes to determine where objects are in space. Bats use echolocation to navigate and find food in the dark. To echolocate, bats send out sound waves from their mouth or nose. When the sound waves hit an object they produce echoes. The echo bounces off the object and returns to the bats ears. Bats listen to the echoes to figure out where the object is, how big it is, and its shape. Using echolocation, bats can detect objects as thin as a human hair in complete darkness. Echolocation allows bats to find insects the size of mosquitoes, which many bats like to eat.
The test shows the size and shape of your heart and how well your heart chambers and valves work. Echo also can identify areas of poor blood flow to the heart, areas of heart muscle that aren't contracting normally, and heart muscle damage caused by lack of blood flow. Echo might be done before and after a stress test (see below). A stress echo can show how well blood is flowing through your heart.