Components of blood (article) | Khan Academy
The different components that make up blood. Plasma, white blood cells, red blood cells, platelets.
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Flow through the heart (video) | Khan Academy
Course: Health and medicine > Unit 2. Lesson 1: Circulatory anatomy and blood flow. Meet the heart! Flow through the heart. Two circulations in the body. The heart is a double pump. Parts of the heart. Lub dub. Arteries vs. veins - what's the difference?
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Kidneys are important organs that filter our blood and produce urine to maintain balance (homeostasis) in our body. Blood enters the kidneys through renal arteries and exits through renal veins. The nephron, the smallest functional unit of the kidney, handles filtration and collection.
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Lesson 1: Body structure & homeostasis. Tissues, organs, & organ systems.
Homeostasis - Khan Academy
Jun 18, 2016 · To appreciate how diabetes occurs, let's take a quick look at the basics of blood sugar regulation. In a healthy person, blood sugar levels are controlled by two hormones: insulin and glucagon.
Prokaryotic and eukaryotic cells (video) | Khan Academy
Eukaryotic cells contain membrane-bound organelles (such as the nucleus and mitochondria), while prokaryotic cells do not. DNA in eukaryotic cells is found inside the nucleus, while DNA in prokaryotic cells is located in the cytoplasm. Eukaryotic cells are generally larger and more complex than prokaryotic cells. Eukaryotic organisms include animals, plants, fungi, and …
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Smooth muscles, found in hollow organs and blood vessels, work slowly and involuntarily to control functions like digestion and blood flow. Each muscle type has a unique cellular structure. Skip to main content
Organization in the human body (video) | Khan Academy
In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues, and organs that are specialized for particular body functions. Organs work together in organ systems to carry out specific functions for the organism.