The Blood Part 1| An Overview of Blood | Characteristics of Blood | Plasma proteins | Hematocrit

Round-13 hunt: picked; source: named-course long-video search (round-12 queries, single-hit channels, second prefilter); channel screens (sellers/exam/re-upload/devotional/vendor/events), provenance check, vendor/seller/devotional recheck and quality tier C + tier-C depth check passed; strict per-title check + final strict pass; oEmbed verified.

A 18-minute video from null: “The Blood Part 1| An Overview of Blood | Characteristics of Blood | Plasma proteins | Hematocrit”.

Video by null, played through YouTube's embedded player.