Collagen fibrils and fibers
Fibroblasts secrete tropocollagen molecules that assemble into collagen fibrils, displaying a repeating 64 nm banding pattern. There are numerous types of collagen, the most prevalent being Types I, II, III and IV. Types I, II and III form fibrils; Type IV, a major component of the basal lamina, does not. Type I fibrils further assemble into larger fibers and bundles, which can range from 1 to 20 microns in diameter. A small peripheral nerve is seen surrounded by a large fiber. 14,000x
Collagen fibrils
Fibroblasts secrete tropocollagen molecules that assemble into collagen fibrils, displaying a repeating 64 nm banding pattern. There are numerous types of collagen, the most prevalent being Types I, II, III and IV. Types I, II and III form fibrils; Type IV, a major component of the basal lamina, does not. Type I fibrils further assemble into larger fibers and bundles, which can range from 1 to 20 microns in diameter. A small peripheral nerve is seen surrounded by a large fiber. 14,000x
Collagen fibers
Fibroblasts secrete tropocollagen molecules that assemble into collagen fibrils, displaying a repeating 64 nm banding pattern. There are numerous types of collagen, the most prevalent being Types I, II, III and IV. Types I, II and III form fibrils; Type IV, a major component of the basal lamina, does not. Type I fibrils further assemble into larger fibers and bundles, which can range from 1 to 20 microns in diameter. A small peripheral nerve is seen surrounded by a large fiber. 14,000x
Ground substance
Fibroblasts secrete tropocollagen molecules that assemble into collagen fibrils, displaying a repeating 64 nm banding pattern. There are numerous types of collagen, the most prevalent being Types I, II, III and IV. Types I, II and III form fibrils; Type IV, a major component of the basal lamina, does not. Type I fibrils further assemble into larger fibers and bundles, which can range from 1 to 20 microns in diameter. A small peripheral nerve is seen surrounded by a large fiber. 14,000x
Peripheral nerve
Fibroblasts secrete tropocollagen molecules that assemble into collagen fibrils, displaying a repeating 64 nm banding pattern. There are numerous types of collagen, the most prevalent being Types I, II, III and IV. Types I, II and III form fibrils; Type IV, a major component of the basal lamina, does not. Type I fibrils further assemble into larger fibers and bundles, which can range from 1 to 20 microns in diameter. A small peripheral nerve is seen surrounded by a large fiber. 14,000x