Asked by Kayla Bryfogle on Jun 10, 2024
Verified
From the inside of the lungs, what is the first cell type the air must pass through to reach the blood?
A) simple squamous epithelium
B) cartilage
C) muscle
D) red blood cells
E) pseudostratified ciliated columnar epithelium
Simple Squamous Epithelium
A single layer of flat, scale-like cells that line organs and body cavities, allowing for easy diffusion or filtration due to their thinness.
Alveoli
Tiny air sacs within the lungs where gas exchange occurs, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled during respiration.
Blood
A body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to cells and transports metabolic waste products away.
- Elucidate the function and critical role of gas transfer within the lungs.
Verified Answer
LP
Lauren PolitanoJun 14, 2024
Final Answer :
A
Explanation :
The first cell type air encounters from the inside of the lungs on its way to the blood is the simple squamous epithelium, which makes up the alveoli where gas exchange occurs.
Learning Objectives
- Elucidate the function and critical role of gas transfer within the lungs.