EPISODE · Jan 15, 2026 · 29 MIN
The Excretory System
from MCAT Basics (from MedSchoolCoach) · host MedSchoolCoach
In this episode, we're covering the anatomy and physiology of key organs such as the kidneys, liver, skin, lungs, and large intestine, and discuss the crucial role they play in eliminating waste products from our bodies. From the structure of the hepatic lobules in the liver to the sweat glands in our skin and the alveoli in our lungs, we'll cover how each component functions to maintain homeostasis. We'll also delve into the metabolic breakdown processes and the excretion of waste molecules such as urea, electrolytes, and gases like carbon dioxide. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: [00:00] Introduction to the MCAT Basics Podcast with host, Sam Smith [04:50] Kidney, adrenal glands, nephrons filter blood. Bladder stores waste connected to kidneys. [09:57] Liver has lobes and functional hepatic lobules. Skin excretes through sweating. [12:20] Lung anatomy: trachea, bronchi, alveoli, gas exchange. [16:54] Urea cycle energy requirement, deamination of amino acids. [20:35] Urea density calculates volume of small ice cube. [24:15] Carbon dioxide is a metabolic byproduct. [27:46] Liver metabolizes drugs into water-soluble compounds.
What this episode covers
In this episode, we're covering the anatomy and physiology of key organs such as the kidneys, liver, skin, lungs, and large intestine, and discuss the crucial role they play in eliminating waste products from our bodies. From the structure of the hepatic lobules in the liver to the sweat glands in our skin and the alveoli in our lungs, we'll cover how each component functions to maintain homeostasis. We'll also delve into the metabolic breakdown processes and the excretion of waste molecules such as urea, electrolytes, and gases like carbon dioxide. Visit MedSchoolCoach.com for more help with the MCAT. Jump into the conversation: [00:00] Introduction to the MCAT Basics Podcast with host, Sam Smith [04:50] Kidney, adrenal glands, nephrons filter blood. Bladder stores waste connected to kidneys. [09:57] Liver has lobes and functional hepatic lobules. Skin excretes through sweating. [12:20] Lung anatomy: trachea, bronchi, alveoli, gas exchange. [16:54] Urea cycle energy requirement, deamination of amino acids. [20:35] Urea density calculates volume of small ice cube. [24:15] Carbon dioxide is a metabolic byproduct. [27:46] Liver metabolizes drugs into water-soluble compounds.
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The Excretory System
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