The outermost layer of an artery is known as the tunica externa, also known as tunica adventitia, and is composed of collagen fibers and elastic tissue. Most of the layers have a clear boundary between them, however the tunica externa has a boundary that is ill-defined.
Normally its boundary is considered when it meets or touches the connective tissue. Inside this layer is the tunica media, or media, which is made up of smooth muscle cells, elastic tissue and collagen fibres.
Burns that affect only the superficial skin layers are known as superficial or first-degree burns. They appear red without blisters and pain typically lasts around three days.
When the injury extends into some of the underlying skin layer, it is a partial-thickness or second-degree burn. Blisters are frequently present and they are often very painful. Healing can require up to eight weeks and scarring may occur.
1. Fecal microbiota transplantation (FMT) led to individualized response of phenotype, mucosal and fecal microbiome in obese subjects.
2. FMT led to an increased relative abundance of Bacteroides in the colonic microbiome while was less influential in shaping microbiota of the small intestine
Bench to bed series: Lung COPD part 3/3 #scRNAseq paper: Human distal airways contain a multipotent secretory cell that can regenerate alveoli 1. RASCs (new cell-type) + #stemcell properties in distal airways 2. faulty RASC-to-AT2 transformation in COPD #Bioinformatics#meded