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How have cells from the windpipe adapted to do their job?
they have a large surface area, a good blood supply close by, thin walls (often only 2 cells thick) and are moist. This all aids in effective gas exchange.
How are alveoli adapted to maximise diffusion?
The key is surface area. The indentations make the surface area of the lungs inner surface to be many times the surface area of a similarly sized sphere. The greater surface area means that the diffusion distance from the air cavity in the lung to the vascular part of the lung is very short.
What are the characteristics of gaseous exchange surfaces?
Features of gas exchange surfacesHave a large surface area relative to the volume of the organism.They are thin, so have a short diffusion pathway.They have a moist surface where gases can dissolve first before they diffuse in our out.They are able to maintain the diffusion gradient down which the gases can diffuse.
What blood vessels contain thick muscular tissue within their walls to pump blood throughout the body?
Arterial walls contain thick, muscular tissue to pump blood throughout the body. Veins have thinner walls.
What type of muscle is found in the walls of hollow organs and in the walls of blood vessels?
multiunit smooth muscle are found in those areas and a few more.
How have cells from the windpipe adapted to do their job?
they have a large surface area, a good blood supply close by, thin walls (often only 2 cells thick) and are moist. This all aids in effective gas exchange.
What is the avioli?
Well, first of all they're called the Alveoli. Alveoli are tiny sacs in the lungs that perform gas exchange. That is the main process of respiration where the body gets rid of carbon dioxide and picks up oxygen which is used in metabolism. They have supply of oxygenated and de-oxygenated blood surrounding their surface giving them a high blood supply. They also have thin walls and a moist surface. This is all required for them to work correctly.
What are the functions of alveoli?
Alveoli are tiny sacs in the lungs that perform gas exchange. That is the main process of respiration where the body gets rid of carbon dioxide and picks up oxygen which is used in metabolism. They have supply of oxygenated and de-oxygenated blood surrounding their surface giving them a high blood supply. They also have thin walls and a moist surface. This is all required for them to work correctly.
What are the types and characteristics of respiratory surfaces in animals?
large area
What are the characteristic of alveoli in the lungs?
Large surface area due to the combined spherical shape (600 million alveoli = 80 m2) Flattened epithelial cells of alveoli and close association with capillaries Short diffusion distance from alveoli to blood (0.5-1.0 um) Dense capillary network Moist surface for the solution of gases
What is the job of the smooth muscle in the artery walls?
To contract or dilate in order to increase/decrease blood pressure (and obviously blood supply)
Five features of the villus in absorption?
thin walls good blood supplymoist lininglarge surface areasingle layer of surface cells
What makes lungs well adapted for gas exchange?
the alveolusOTHER ANSWER:The surface area is kept moist to allow the oxygen and the carbon dioxide to pass troughand large surface area is availeble.By Fla97Answer2:The walls of the alveoli are adapted for efficient gas exchange in the following ways:(i.)Large surface area. The total surface area of all the alveoli in both the lungs is over 100m2.(ii.)Thin Walls. Alveolar walls are composed of a single layer of cells called epithelium. The surrounding capillary walls are also one cell thick. So gases need to diffuse only across this small distance to get into the blood.(iii.)Moist Surface. Special cells in the wall of the alveoli produce a watery fluid so oxygen can dissolve, then diffuse into the blood cells of the capillary.(iv.)The vast network of capillaries surrounding the alveolus supply blood to continuously carry the oxygen away from, and carbon dioxide to, the alveoli. In red blood cells, the presence of a respiratory pigment called hemoglobin, which combines with oxygen, increase the oxygen carrying ability of blood. The continual removal of oxygen keeps oxygen levels low in the capillaries. This favors rapid diffusion of oxygen from alveolus to blood as a steep diffusion gradient is mantained.Note: adaptations (i) to (iv) are structural adaptations(v.)Ventilation of lungs. The constant movement of air in and out of lungs maintains an efficient diffusion gradient for exchange of oxygen and carbon dioxide which takes place between the air and blood capillaries surrounding the alveoli lungs.
How do the walls of the heart receive a blood supply in order to stay healthy?
the heart receives glucose and oxygen in the blood pumped through
What vessels supply oxygen and nutrients to the walls of large blood vessels?
The lymphatic system, although the oxygen comes from the blood itself as it passes through the alveoli
How are alveoli adapted to maximise diffusion?
The key is surface area. The indentations make the surface area of the lungs inner surface to be many times the surface area of a similarly sized sphere. The greater surface area means that the diffusion distance from the air cavity in the lung to the vascular part of the lung is very short.
What are the characteristics of gaseous exchange surfaces?
Features of gas exchange surfacesHave a large surface area relative to the volume of the organism.They are thin, so have a short diffusion pathway.They have a moist surface where gases can dissolve first before they diffuse in our out.They are able to maintain the diffusion gradient down which the gases can diffuse.
