This meditation (recorded live) aims to strengthen and deepen the 32 Parts of the Body portion of Body Contemplation in the Four Foundations of Mindfulness — not meant as regular practice or substitute. Partial inspiration comes from this Four Foundations of Mindfulness visual:
“Just as if there were a double-mouthed provision bag full of various kinds of grain such as hill paddy, paddy, green gram, cow-peas, sesamum, and husked rice, and a man with sound eyes, having opened that bag, were to take stock of the contents thus: “This is hill paddy, this is paddy, this is green gram, this is cow-pea, this is sesamum, this is husked rice.” Just so, monks, a monk reflects on this very body enveloped by the skin and full of manifold impurity, from the soles up, and from the top of the head-hairs down, thinking thus: “There are in this body hair of the head, hair of the body, nails, teeth, skin, flesh, sinews, bones, marrow, kidney, heart, liver, midriff, spleen, lungs, intestines, mesentery, gorge, feces, bile, phlegm, pus, blood, sweat, fat, tears, grease, saliva, nasal mucus, synovial fluid, urine.” ~The Foundations of Mindfulness — Satipatthana Sutta