Select all correct descriptions of the alveoli of human lungs.Multiple select question.The total surface area of the alveoli is similar to a two-car garage.Each alveolar sac is surrounded by blood capillaries.Alveolar walls are composed of simple squamous epithelium.A normal adult has about 300 million alveoli.O2 diffuses from the blood into alveoli and CO2 diffuses from alveoli into blood.

Select all correct descriptions of the structure of human lungs.Multiple select question.Each lung lobe is divided into many lobules.Each alveolus is further divided into many subalveoli.Each lung is divided into lobes.There are two lungs on the right side of the trachea, but only one lung on the left.Each lung lobule contains many alveoli.

Recall which of the following statements about alveoli are true.They are tiny sacs within the lungsThey expand when you breathe outTheir walls are membranes that allow oxygen and carbon dioxide to diffuse throughThey are not well connected to blood vessels

Alveoli are small sacs found in the lungs. The alveoli are where oxygen (O2) and carbon dioxide (CO2) are exchanged between the organism and the surrounding air.An alveolus is shown in the image below:Which of the following statements is false about the diffusion that occurs in the alveoli?Carbon dioxide will diffuse from an area of high concentration to where there is a low concentration of oxygen.Oxygen diffuses from an area of high concentration in the alveoli into an area of low concentration in the blood. The oxygen is later used in body cells for respiration.Carbon dioxide moves from an area of high concentration in the bloodstream to an area of low concentration in the alveoli. Carbon dioxide is a waste product from the process respiration.

why our lungs contain millions of small alveoli instead of two large, lung-sized alveoli.

Which of these facts is true for the bronchioles but not the alveoli?A. large surface areaB. very good blood supplyC. walls are one cell thickD. lined with cilia