The immune system is probably one of the most important bodily functions, serving as the defense against all infection that can damage the body and mitigating the damage. This happens via four different types of cells that do different things Leukocytes are basically the alarm for the immune system. It tells the rest of the …
Category Archives: Kahn Acadamy Science
KAAs7: Muscles
(Just so you know, there was not a lot of content about the skeleton, so I opted not to include it. This is not a part of the essay) Muscles are one of the most important parts of your body. They control every single part of your physical movement. From blinking to lifting things to …
KAAs6: Food Digestion (Gastrointestinal System)
All food you eat has to pass through the same set of digestive organs that break down the food and then extract the nutrients, before expelling the waste. Food starts in the mouth before progressing through the esophagus and to the stomach, and then through the intestines and then out through the anus. Today I’m …
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KAAs5: Nervous System
In this essay I’m going to do my best to explain the nervous system. The Nervous System is broke into two categories: The Central Nervous System and the Peripheral Nervous System. Nerves work sort of like electricity; and (I think) that the signals are sent a little bit like morse code. Different things send different …
KAAs4: Endocrine System
The Endocrine System is a way that the body communicates between its different organs. The Endocrine system functions by passing hormones into the blood. Different organs send different hormones, and, depending on the hormone, the glands in different organs pick it up. This is the most prominent communication system other than the nerves inside the …
KAAs3: The Composition of Blood
I’m going to do my best to describe the composition of blood and what each part of the blood does, but as I have no former science knowledge, I have had a hard time understanding all of the information presented, but I will do my best to make sense of it. There are four main …
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KAAs2: The Respiratory System Today I’m going to talk about how the respiratory system functions. For those of you that don’t know, the respiratory system is the system that provides your body with oxygen from the atmosphere of the Earth. Let’s start at the beginning of a breath. The lungs rest between breaths. When you …