Endothelium, which is the innermost layer of all blood vessels.
Blood vessels are surrounded by very small circular muscles which contract and relax to allow blood vessels to constrict and dilate. The vessels also contain elastin which allows them to stretch.
Tunica Media
The outer layer of blood vessels is composed of connective tissue called the tunica externa or adventitia. This layer provides structural support and protection to the blood vessel. It also helps to anchor the vessel in place within surrounding tissues.
the middle layer, called the tunica media
The Epidermis is the outermost, Avascularized (lacks blood vessels), protective layer. Its composed of Keratinized Stratified Squamous Epithelial Cells.
connectiveThe outer layer of a blood vessel (artery or vein) is called the tunica externa or tunica adventitia.See http://training.seer.cancer.gov/module_anatomy/unit7_3_cardvasc_blood1_classification.htmlpericardium is the layer of the blood vessel that is made of tough connective tissue.
it is called Endothelium (endothelial layer) composed of simple squamous epithelium forming a countinuous barrier.
Endothelial tissue forms the inner lining of blood vessels. This thin layer of cells plays a crucial role in regulating vascular tone, blood flow, and the movement of substances between the bloodstream and surrounding tissues.
The epineurium is the outermost layer of connective tissue surrounding a peripheral nerve. It includes the blood vessels supplying the nerve.
Epithelial tissue: a thin layer of cells that lines the surfaces of organs, blood vessels, and cavities. Endothelial tissue: a type of epithelial tissue that lines the interior surface of blood vessels and lymphatic vessels. Elastic tissue: a connective tissue that contains elastin fibers, providing elasticity to structures like skin, lungs, and blood vessels. Embryonic tissue: early tissue formed during embryonic development that gives rise to all the different types of tissues in the body.
The primary tissue of the tunica submucosa is loose connective tissue. This layer lies beneath the mucosa and contains blood vessels, lymphatic vessels, nerves, and glands that support the function of the mucosa.
Venules are small blood vessels with three basic layers. These layers are an inner membrane called an endothelium, a middle layer of muscle tissue, and the outer layer, which is made of fibrous connective tissue.