https://www.nih.gov/news-events/nih-research-matters/new-brain-cleaning-system-discovered https://www.nih.gov/news-events/nih-research-matters/new-bra... https

https://www.nih.gov/news-events/nih-research-matters/new-brain-cleaning-system-discovered https://www.nih.gov/news-events/nih-research-matters/new-bra... https://www.nih.gov/news-events/nih-research-matters/lymphatic-vessels-discovered-central-nervous-system https://www.nih.gov/news-events/nih-research-matters/lymphat... Lymphatic system does connect to the circulatory system, so can eventually be handled by the kidneys, liver, etc. But it's not necessarily a direct path, according to recent research.