Search results
Three layers of tissue make up the skin: Epidermis, the top layer. Dermis, the middle layer. Hypodermis, the bottom or fatty layer. What does the epidermis (top layer of skin) do? Your epidermis is the top layer of the skin that you can see and touch. Keratin, a protein inside skin cells, makes up the skin cells and, along with other proteins ...
- Stratum Basale. The bottom layer of the epidermis is called the stratum basale. This layer contains one row of column-shaped keratinocytes called basal cells.
- Stratum Spinosum. The spinosum layer lies just over the stratum basale and is only about five to 10 cells thick. Cells that move into the spinosum layer (which is also known as the prickle cell or squamous cell layer) naturally morph from its initial columnar shape into a polygonal (multi-sided) one.
- Stratum Granulosum. The cells in the stratum granulosum, or granular layer, have lost their nuclei and appear as flattened cells containing dark clumps of cytoplasmic material.
- Stratum Lucidum. The stratum lucidum layer is only present in the thicker skin of the palms and soles. Its main function is to reduce friction between the stratum corneum and stratum granulosum.
Figure 5.1.1 – Layers of Skin: The skin is composed of two main layers: the epidermis, made of closely packed epithelial cells, and the dermis, made of dense, irregular connective tissue that houses blood vessels, hair follicles, sweat glands, and other structures. Beneath the dermis lies the hypodermis, which is composed mainly of loose connective and fatty tissues.
- Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...
- 2019
- Stratum corneum. This layer is the first line of defense against the environment. It is comprised of keratin and helps protect against bacteria and UV damage.
- Stratum lucidum. A thin clear layer that is only present in skin that is commonly damaged, such as palms of the hands and soles of the feet. It is meant to help the body withstand friction.
- Stratum granulosum. This layer acts as the waterproofing layer and keeps the body from losing water. The types of fats in this layer keep the skin cells attached to each other.
- Stratum spinosum. Also called the prickle cell layer. This layer contains dendritic cells, which are part of the body’s immune system that helps fight against foreign invaders such as germs.
Feb 24, 2023 · The skin and its accessory structures make up the integumentary system, which provides the body with overall protection. The skin is made of multiple layers of cells and tissues, which are held to underlying structures by connective tissue (Figure \(\PageIndex{1}\)). The deeper layer of skin is well vascularized (has numerous blood vessels).
May 19, 2023 · The number of skin layers that exists depends on how you count them. You have three main layers of skin—the epidermis, dermis, and hypodermis (subcutaneous tissue). Within these layers are additional layers. If you count the layers within the layers, the skin has eight or even 10 layers.
People also ask
What is the bottom layer of skin called?
What is the bottom layer of the epidermis called?
What are the two layers of the skin?
What is the outermost layer of your skin?
Which layer of skin consists of tightly pack epithelial cells?
What is the most superficial layer of skin?
Sep 16, 2024 · The hypodermis (also called the subcutaneous layer) is a layer directly deep to the dermis that serves to connect the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although some of the accessory organs of the integument as well as sensory receptors are located in the hypodermis.
