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Respiratory system diseases
Our lungs are composed of a bronchial tree (think of an upside down tree with millions of leaves), blood vessels bringing blood in and out, and a protein-rich fluid that forms a matrix holding everything together! If any part of this well-balanced organ isn’t working properly, a person can be left feeling short of breath. The lungs are also exposed to the outside environment, making them prone to infections. To counter infections, the lungs are lined with cells that have tiny protein bristles which wave back and forth and can literally sweep away dangerous bacteria. Learn more about diseases of the lungs and how modern medicine helps to keep them healthy!
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What homeschoolers say about Khan Academy
Homeschoolers widely appreciate Khan Academy for its extensive free resources covering a broad range of subjects and grade levels, including test prep and advanced topics. Many praise its clear video lessons and interactive exercises that allow self-paced learning. However, some families find the platform less structured and requiring significant parental oversight to ensure consistent progress. Additionally, while the content quality is generally high, a few users note that the presentation can feel dry or overly academic for younger learners. Overall, Khan Academy is valued for accessibility and depth but may need supplementation for a fully rounded homeschool curriculum.
About Khan Academy’s materials generally, not this resource specifically. Summarized by Learnamic from public homeschool reviews and discussions.
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