The walls of the alveoli contain several layers of smooth mu

The walls of the alveoli contain several layers of smooth muscle. contains goblet cells. are ciliated. are composed of simple squamous epithelium. are surrounded by cartilage. Which layer of the small intestine wall contains cells with microvilli? muscular is adventitia mucosa submucosa serosa Nutrient-rich blood from the digestive tract comes to the liver by way of the inferior vena cava. hepatic artery. celiac trunk. hepatic vein. hepatic portal vein. Which layer of the digestive tract is in direct contact with the food consumed? muscular is peritoneum submucosa serosa The muscular is layer in the wall of the digestive tract is skeletal muscle throughout the tract, especially in the large intestine. the layer of the digestive tract wall that contains capillaries. in direct contact with the food that is consumed. composed of a layer of circular smooth muscle fibers and a layer of longitudinal muscle fibers. connective tissue and the peritoneum.

Solution

29. D.

Single layer of simple squamous epithelium allows oxygen from the air to enter the blood capillaries of lungs. This aids in diffusion of gases in the lungs.