Search results
Results from the WOW.Com Content Network
The different components that make up blood. Plasma, white blood cells, red blood cells, platelets.
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.
Innate immunity. Adaptive immunity. Role of phagocytes in innate or nonspecific immunity. Types of immune responses: Innate and adaptive, humoral vs. cell-mediated. B lymphocytes (B cells) Professional antigen presenting cells (APC) and MHC II complexes. Helper T cells.
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.
The human heart is divided into four chambers. There are one atrium and one ventricle on each side of the heart. The atria receive blood and the ventricles pump blood. The human circulatory system consists of several circuits: The pulmonary circuit provides blood flow between the heart and lungs.
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Khan Academy. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Explore. Search. AI for Teachers. Donate.
Explanation of prokaryotic cells, including structure, function, and examples.
Blood vessels in that area expand, and white blood cells leak from the vessels to invade the infected tissue. These white blood cells, called phagocytes engulf and destroy bacteria. The area often becomes red, swollen, and painful during an inflammatory response.
Learn about the kidney and nephron in this Khan Academy video.