BMS 250 Chapter Notes - Chapter 5: Tympanic Cavity, Zygote, Blastocyst

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15 Aug 2018
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Smooth muscle tissue: also called visceral or involuntary muscle tissue, it lacks the striations seen in other muscle tissue, and so this tissue appears smooth. Smooth muscle cells are fusiform which means they are thick in the middle and tapered at their ends. These cells are relatively short and contain one centrally located oval nucleus. Smooth muscle tissue is also called visceral muscle tissue because it is found in the walls of most viscera, such as the intestines, stomach, airways, urinary bladder, uterus, and blood vessels. The contraction of smooth muscle helps propel material movement through these organs or controls the size of the lumen. It consists of cells called neurons that receive, transmit, and process nerve impulses. It also contains a larger number of cells called glial cells, which do not transmit nerve impulses but instead are responsible for the protection, nourishment, and support of the neurons.

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