Question map
Which one of the following body parts/organs of the human body doe Ureters does have smooth muscles?
Explanation
Smooth muscle is an involuntary, non-striated muscle found in the walls of hollow organs and various internal structures [2]. It is widely distributed in the human body, including the walls of the urogenital tract such as the ureters, the respiratory tract including the bronchi of the lungs, and the eye where it forms the iris and ciliary body. Specifically, smooth muscles in the iris control pupil dilation and constriction, while those in the bronchi manage airway width. In contrast, the biceps (biceps brachii) is a skeletal muscle. Skeletal muscles are striated and under voluntary control, attaching to and moving bones in response to conscious messages from the nervous system. Therefore, while ureters, the iris, and bronchi all contain smooth muscle, the biceps does not, as it is composed of skeletal muscle tissue.
Sources
- [1] https://www.ncbi.nlm.nih.gov/books/NBK526125/
- [2] https://www.ncbi.nlm.nih.gov/books/NBK532857/