That is correct. Alveoli only contain only two types of cells: Type I cells that are like thin sheets and make up the actually wall of the alveoli, and Type II cells that secrete a substance called surfactant that helps to hold the alveoli open. There can also be some macrophages present in the alveoli to destroy invading bacteria.
No, mucus is not a muscle but a secretion in epithelial tissue.
tongue
No, the alveoli do not have smooth muscle. Alveoli are small air sacs in the lungs where gas exchange occurs, allowing oxygen to enter the bloodstream and carbon dioxide to exit. Smooth muscle is found in the walls of larger airways like bronchioles, which help regulate the diameter of the airways.
The major tissues of the gallbladder include the mucosa (inner lining), muscularis (smooth muscle layer), and serosa (outer covering). The mucosa contains absorptive cells, mucous-secreting cells, and glands. The muscularis layer contracts to facilitate the release of bile into the small intestine.
The bronchial walls are made up of cartilage, smooth muscle, connective tissue, and mucous-secreting cells. These components work together to provide structure, support, and regulation of airflow in the respiratory system.
There is no skeletal muscle that is covered with a mucous membrane. Skeletal muscles are typically covered with connective tissue known as the epimysium, perimysium, and endomysium, which provide protection and support for the muscle fibers. Mucous membranes are typically found lining organs in the respiratory, digestive, and urinary systems to provide protection and help with absorption.
An ulcer is not a type of muscle. It is an open sore on a mucous membrane like the stomach wall or on the skin.
A muscle is neither a cell nor a organ, it is a muscle
You do not have any such cubes in your respiratory system.
The superior longitudinal muscle, an intrinsic muscle that originates within the tongue allows the tongue to curl. It runs along the superior surface of the tongue under the mucous membrane.
The biceps brachii muscle.
chronic bronchitis