peristalsis
Peristaltic waves are involuntary muscle contractions that take place in various bodily tubes. These waves can be seen in areas such as the alimentary tract where effects of food and waste product transporting takes place.
A gastrovascular cavity is a digestive sac with only a single opening. A complete digestive tract (otherwise known as an Alimentary canal) has two openings (a mouth and anus) between its digestive tubes unlike the gastrovascular cavity in which food is ingested and eliminated through the same opening (example would be hydra)
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Muscular tubes in the body are often referred to as "muscular ducts" or "muscular tubes." An example includes the esophagus, which transports food from the mouth to the stomach through rhythmic contractions called peristalsis. Other examples include the trachea and various blood vessels, which also feature muscular layers to help facilitate the movement of substances.
Malpighian Tubes
Sphincter muscles. They are smooth muscles found in various parts of the body, such as the digestive system and urinary tract, and control the opening and closing of tubes or openings.
The upper female genital tract consists of the body of the uterus, the fallopian or uterine tubes, and the ovaries.
Simple columnar epithelial
Contractions and relaxation of heart chambers make the blood flow inside the tubes or blood vessel.
Fallopian tubes
They are called Fallopian tubes
A group of test tubes are called samples.