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sorry for mass tag
no this is an essay i have to write, can you just provide me with some resources just to get me started
it has to be in four paragraphs taking about the four primary tissues that contribute to the skin?
Stratified Keratinised Squamous Epithelium forms the dry surface of the skin.It has many superficial layers of horny, scale-like remains of dead squamous cells & several deeper layer of living cells. Heavy deposits of insoluble protein KERATIN in the dead superficial cells make the epithelium impervious to water and highly resistant to mechanical abrasions.
A keratinizing stratified squamous epithelium is specialized to cover the body; it is a dry covering capable of withstanding relatively high degrees of abrasion, it prevents rapid dessication of the body and it is waterproof. The surface of this epithelium is characteristically dry. While thin skin containing hair follicles is kept supple with oils from sebaceous glands, the surface is free of mucus. Mucus is not needed because this epithelium relies on other tissue features to prevent the dessication of deeper tissues. The vast majority of the epithelial cells in this epitheial lining are keratinocytes. Keratinocytes produce and fill with keratin, a mechanically tough, fibrillar, protein of the intermediate filament family of cytoskeletal proteins. The keratin provides the mechanical strength that enables the tissue to withstand greater degrees of abrasive force than withstood by the nonkeratinizing variety of this tissue. The cells also produce and secrete a glycolipid that adsorbs to the extracellular surface of the plasma membrane to fill interstitial spaces, making the tissue waterproof. The apical layers of this keratinizing stratified squamous epithelial membrane are dead, cornified keratinocytes completely filled with keratin. They are sloughed off the surface when acted upon by abrasive forces. As the apical layers of keratinocytes give way, they are continuously replaced by the deeper layers of keratinocytes, all of which are derived from the highly mitotic cells of the basal layer. As the keratinocytes are pushed up from the basal layer, the cells differentiate, a process that primarily involves the accumulation of keratin, which provides mechanical strengt to the tissue, but which eventually interferes with the metabolic processes of the cells, leading to cell death. This differentiation process is revealed histologically as several tissue strata: stratum basale, stratum spinosum, startum granulosum, stratum lucidum and stratum corneum. Each stratum is marked by a milestone in the differentiation process.
are these the four primary tissues that contribute to the skin
Skin has 1)Epithelial Tissue 2)Connective Tissue 3)Muscle Tissue 4)Nerve Tissue
and these the four primary tissues that contribute to the skin
Previous was just 4 para ;)
Thank you so much, I will definitely ask you for more help, if you don't mind that is
:D Any time amigo
by the way what grade are you in and what is your major, how old are you
16, I'm in 11th Grade, Bio & Biotech
great this is bio 281 subject
i guess answer is been posted...right>??
Can you help me put this in our own words Ramiro, as this is to be turned in. I would really appreciate it.
The skin has three layers: The epidermis on the outside. This is made from layers of cells with a basal layer, which is always forming new cells through cell division. The new cells gradually move towards the surface, which takes 1-2 months. As they move up they gradually die, become flattened and develop keratin and the outermost layer of flat dead cells is being continually worn away by friction. The keratin and oil from the sebaceous glands help to make the skin waterproof. The dermis is the inner layer. The following tissues and structures can all be found in the dermis: Connective tissue – packs and binds the other structures in the skin. Elastic fibres – make the skin resilient. Capillaries – tiny blood vessels. Muscle fibres – to move the position of the hairs. Sensory cells – to sense touch, pressure, heat, cold and pain. Nerve fibres – to activate muscles and glands and relay messages from the sensory cells to the brain. Pigment cells which produce Melanin – a very dark pigment. Sweat glands which open onto the surface as pores Hair follicles – pits in the epidermis in which hairs grow. Sebaceous glands – produce oil to keep hair follicle free from dust and bacteria, and to help to waterproof the skin. There is a layer of fat underneath and in the lower regions of the dermis. The thickness of this layer varies depending on the place in the body and from person to person. A store of fat is useful to the body as insulation and it can be used for energy when the intake of nutrients is insufficient.
This is great but I think this is copyied right from the internet, is there a way i can put these in my own words. So i t dosent look like i copied from the internet