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alveoli
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Describe how chemicals are exchanged between cells and blood?
Chemicals are exchanged between cells and blood through processes such as diffusion and active transport. Oxygen and nutrients are transported from the blood to the cells, while waste products and carbon dioxide are transported from the cells to the blood. This exchange occurs across the walls of capillaries, which have thin walls that allow for efficient diffusion of molecules between the blood and cells.
What are the main substances that diffuse out of leaves?
water and oxygen
What things diffuse into?
The molecules of food and oxygen diffuse into cells. oh and btfw co2 and waste chemicals diffuse ut of cells. im in year 3
What is the function of simple squamous epithelium of the alveoli?
The alveoli is just one cell layer thick so that diffusion of gasses between the capillaries and the alveoli is easy. Simple squamous epithelium are found in the capillary walls and the alveolar walls. They are thin so diffusion is easy.
What two gases diffuse into or out of cells?
Oxygen and Carbon dioxide
Why are capillaries the site of material exchange between the cells and blood?
The walls of capillaries are very thin allowing the nutrients of cells to diffuse through them. They facilitate the diffusion of nutrients to the body by passing them through their cell walls.
What organ of the circulatory system absorbs nutrients and removes wastes?
Wastes and nutrients are carried in the blood and diffuse across the capillary walls.
Nutrients and oxygen diffuse into body cells from what?
Blood -> plasma -> extracellular fluid -> cells.
Inhaled oxygen diffuses through the walls of what?
Inhaled oxygen diffuses through the walls of the alveoli in the lungs into the surrounding capillaries, where it binds to hemoglobin in red blood cells for transport to tissues in the body.
Why are the walls of lymphatic vessels thin?
Capillery walls need to be thin so oxygen, nutrients and otherthings including hormones can diffuse into cells, also thin capilleries are needed for waste products such as carbon dioxide and urea to diffuse out of cells.
What are the characteristics of a capillary?
They are only one cell thick and have very thin walls, to allow nutrients and oxygen to diffuse out of them.
Oxygen and nutrients pass from the blood to the bodys tissues through the thin walls of the?
Capillaries
Body cells receive oxygen and nutrients from food delivered by?
Blood does. It carries oxygen from the lungs with which you breath fresh air in. Then blood goes to the heart and is sent to the whole body with oxygen! Oxygen support the cells', and the body's life!
What provides food and oxygen for a developing embryo?
The Placenta uses a the process of diffusion to diffuse the nutrients from the mothers blood into the babies. Then the umbilical cord carries the nutrients to the baby to the Placenta. Answer is Placenta
Why do capillaries have such thin walls?
Capillaries have thin walls to optimise the level of diffusion of oxygen and other nutrients in the blood stream to the surrounding cells.
Why does the walls of the capillaries and the alveoli have to be thin?
If their walls are too thick, substances like oxygen and nutrients and waste cannot pass across the cells into or out of the body.
Why must capillary be so thin?
Capillery walls need to be thin so oxygen, nutrients and otherthings including hormones can diffuse into cells, also thin capilleries are needed for waste products such as carbon dioxide and urea to diffuse out of cells.
