Components of blood - Khan Academy
Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in. Red blood cells are responsible for carrying oxygen and carbon dioxide. Platelets are responsible for blood clotting.
What's inside of blood? - Khan Academy
This video provides a detailed look at the composition of blood, explaining the roles of plasma, white blood cells, and red blood cells. It also discusses the process of centrifugation, the concept of hematocrit, and the conditions of anemia and polycythemia.
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Learn about the organs and functions of the circulatory system.
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Red blood cells - Khan Academy
So inside of red blood cells, you have millions of hemoglobin proteins. And the hemoglobin proteins-- I'll just draw them as this-- they have these four heme groups. And heme groups, the main component is iron. And that's why iron is so important.
Prokaryotic cells - Khan Academy
All cells share four key components: The plasma membrane is an outer covering that separates the cell’s interior from its surrounding environment. Cytoplasm consists of the jelly-like cytosol inside the cell, plus the cellular structures suspended in it.
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Explore the cellular structure of bone, including the bone matrix and the cells that form it. Understand the organic and inorganic components of the bone matrix - osteoid and hydroxyapatite. Learn about the four types of cells in bone: osteoprogenitor cells, osteoblasts, osteocytes, and osteoclasts.
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Lesson 5: DNA and DNA replication. DNA questions. DNA structure and function. Nucleic acids. DNA. Molecular structure of DNA. Antiparallel structure of DNA strands. Leading and lagging strands in DNA replication. Speed and precision of DNA replication.
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The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrate groups that are attached to some of the lipids and proteins. A phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group.