are blood vessels located in the epidermis
1 Option 1: Large Terms on one side and Definitions on other side of the page. 2  Option 2: Large Terms and Definitions side by side on the same page.  3 x 5 index card Index card size with Terms on one side and Definition on other side. The major blood vessels that supply the skin are in the ____________. You step out of the shower and vigorously rub your skin with a towel. If you were able to analyze the towel, you would find skin cells. They are most likely ___________ _________ ___. The skin is one of the more versatile organs of the body. True. False. Epidermal cells usually grow and divide from the upper layers of the skin and migrate towards the dermis. The _________ is composed of connective tissue, smooth muscles, and nerve cell processes. True or false...the subcutaneous layer is part of the skin. Melanocytes transfer melanin granules to nearby _______________. The nerve fibers in the dermis stimulate nearby _________ and _________ in the dermis. A large number of blood vessels, small in diameter organised into plexus , cover the entire upper level of the dermis, but do not penetrate the epidermis. In particular, they are concentrated beneath the dermal papillae and even deeper, almost in contact with the hypodermis. True or false...the epidermis retains water in deeper skin layers, keeps out harmful chemicals and pathogens, and protects the skin against mechanical injury. __________ are keratinized conical masses on toes. A dilation or constriction of blood vessels results in a red appearance to the skin. They are essentially located in the dermal papillae close to the epidermis, and found only in very low numbers in the deep layers of the dermis known as the reticular dermis. They are specialised in producing two types of protein fibres, collagen and elastin fibres constituent of the extra-cellular matrix. Collagen fibres, 70% of the proteins in the dermis, gives dermis its resistance to strain and traction, while elastin supply its elastic properties. The reticular dermis accounts for the greater part of the dermis. This structure enables the keratinocytes in the epidermis to be rooted in the dermal papillae, while on the side of the dermis, the anchoring fibres interact with the basal membrane to create a network which traps the collagen fibres of the upper part of the dermis. Made up of 80% water, elastin fibres and collagen floating in a glycoprotein gel, the dermis is the tissue supporting the skin. In contrast with the epidermis, it is vascularised, enabling it to not only provide energy and nutrition to the epidermis but also to play a primordial role in thermoregulation and in healing.
No, they do not penetrate the epidermis.