The Human Endocrine System Explained: Hormones, Glands & Feedback Loops (Animated)

Dr. Purr gives a gentle, animated tour of the human endocrine system: what hormones are, how they travel through the blood to target cells with matching receptors (lock and key), endocrine vs exocrine glands, how hormones differ from nerve signals, negative and positive feedback loops (the thyroid loop, insulin and glucagon, oxytocin), and a head-to-toe body-map tour of the glands: hypothalamus, pituitary, pineal, thyroid, parathyroids, thymus, adrenals, pancreas, ovaries and testes, plus organs that also make hormones. ⚠️ Educational only. This video is not medical advice and is not a substitute for a healthcare professional. If you have questions about your health, please talk to a healthcare professional. Chapters: 0:00 Intro 0:33 What are hormones? 1:13 Lock and key: receptors 2:00 Endocrine vs exocrine glands 2:45 Hormones vs nerves 3:25 Negative feedback loops 4:22 Balancing blood sugar 4:56 Positive feedback 5:26 Gland tour: the brain 6:09 Gland tour: neck and chest 6:46 Gland tour: belly and pelvis 7:31 Hormone helpers elsewhere 8:07 When hormones are out of balance 8:53 Quiz 9:32 Outro Sources: Cleveland Clinic – Endocrine System: https://my.clevelandclinic.org/health... Cleveland Clinic – Hormones: https://my.clevelandclinic.org/health... MedlinePlus (NIH/NLM) – Hormones: https://medlineplus.gov/hormones.html MedlinePlus (NIH/NLM) – Endocrine Diseases: https://medlineplus.gov/endocrinedise... Endocrine Society – Hormones and Endocrine Function: https://www.endocrine.org/patient-eng... Endocrine Society – Brain Hormones: https://www.endocrine.org/patient-eng... NCI SEER Training – Endocrine System (exocrine vs endocrine): https://training.seer.cancer.gov/anat... NCI SEER Training – Characteristics of Hormones (receptors, negative feedback): https://training.seer.cancer.gov/anat... NCI SEER Training – Adrenal Gland: https://training.seer.cancer.gov/anat... Cleveland Clinic – Thyroid-Stimulating Hormone (TSH): https://my.clevelandclinic.org/health... Cleveland Clinic – Insulin: https://my.clevelandclinic.org/health... Cleveland Clinic – Oxytocin: https://my.clevelandclinic.org/health... Cleveland Clinic – Hypothalamus: https://my.clevelandclinic.org/health... Cleveland Clinic – Pineal Gland: https://my.clevelandclinic.org/health... Cleveland Clinic – Thymus: https://my.clevelandclinic.org/health... Cleveland Clinic – Ghrelin: https://my.clevelandclinic.org/health... MedlinePlus – Gastrin blood test: https://medlineplus.gov/ency/article/... Cleveland Clinic – Erythropoietin: https://my.clevelandclinic.org/health... Cleveland Clinic – Renin: https://my.clevelandclinic.org/health... 🔊 Narration uses a synthetic (AI text-to-speech) voice: Microsoft Edge neural voice "Ava". The script is written and fact-checked against the sources above. #EndocrineSystem #Hormones #HumanAnatomy #PurrFurrAnatomy