Life science

Skin is the largest organ of the body, covering and protecting the entire surface of the body. The total surface area of skin is around 3000 sq inches or roughly around 19,355 sq cm depending on age, height, and body size. The skin, along with its derivatives, nails, hair, sweat glands, and sebaceous glands forms the integumentary system. Besides providing protection to the body the skin has a host of

The Integumentary System, also known as the skin, is the largest organ of the body. Its complete structure is composed of many different tissues. The skin protects the cow’s body from any bacterial invasions and physical damage. When a cow becomes sick, the skin is the first system that is affected. The integumentary system is composed of three layers: (i) Epidermis, (ii) Dermis, and (iii) Hypodermis or Subcutis. To start with the inner most layer you have the Hypodermis (Subcutis). The Hypodermis consists of connective tissues, elastic fibers and fat. When fat forms a layer of thickness it is called Peniculus Adiposus. Any reserved energy is also stored within the Hypodermis. Then you have the layer, Dermis. The Dermis supports the outer most layer, Epidermis. Dermis consist of collagen, reticular and elastic fibers which plays a large role in the strength and elasticity in the skin; as well as the maintenance and repair of the skin. Lastly, you have the Epidermis. The Epidermis alone consist of four sublayers, (i) Stratum Corneum – outermost horny layer, (ii) Stratum Lucidum – clear layer, (iii) Stratum Granulosum – granular layer, and (iv) Stratum Spinosum – prickly cell layer. The Epidermis is derived from basal membrane Stratum Basale, which presents the openings for the hair follicles. Some of the functions of the skin include: preservation of the cow’s shape, protection from water loss, protection from any physical, chemical and microbial injury imposed by an external agent. An important role of the skin is it balances its Thermoregulation, which is its ability of an organism to regulate its body

Case Study 1 1. Briefly describe the three major layers of skin that make up healthy skin The three layers that make up healthy skin: Epidermis, Dermis and Hypodermis. Epidermis is composed of keratinized, stratified squamous epithelium. This layer provides a thick, water proof protective covering over the underlying skins. The dermis layer is composed of primarily of dense, irregular, fibrous connective tissue that is rich in collagen and elastin. The dermis contains blood vessels, nerve ending, and epidermally derived cutaneous oranges such as sweat glands, sebaceous glands and hair follicles. The last layer is Hypodermis this layer is composed primarily of loose dead skin. The fat layer provides cushioning and insulation for

Lab 5: The Integumentary System Name Using the key choices below, identify the indicated structures. A. adipose tissue B. venule C. motor nerve D. dermis E. arrector pili muscle F. hair bulb G. merocrine sweat gland H. hypodermis I. apocrine sweat gland J. sebaceous gland 1. D 2. H 3.C 4.J 5.E 6.F 7.I 8.G 9.A 10.B [pic] Using the key choices below, choose ALL responses that apply to the following descriptions. A. stratum corneum B. stratum basale C. stratum granulosum D. stratum lucidum E. papillary layer F. reticular layer G. epidermis H. dermis __D___ 1. Translucent cells containing keratin __A___ 2. Dead cells __E___ 3. Dermis layer responsible for fingerprints __F___ 4. Vascular Nails 1. The clear, keratinized portion of a fingernail is known as the nail _PLATE_. It has a root, body, and free edge.

Skin The skin is divided into three different parts including the epidermis, dermis, and hypodermis. The epidermis is the outermost layer of the skin. This region of the skin has no blood cells or blood vessels running through it. All of the nutrients that the epidermis needs are received through diffusion from the dermis. The epidermis is made up of stratified squamous epithelial cells. The epidermis is made of five separate layers: the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and the stratum corneum. Starting at the innermost layer, the stratum basale is where mitosis of keratinocytes takes place. This layer of the epidermis also contains melanocytes which give the skin it’s pigment. As mitosis takes place in the stratum

Skin is the largest organ on the body. It has two layers: the thin outer layer is made up of dead skin cells that are constantly shed and replaced by new cells. The thick inner layer is made up of blood vessels, nerves, and hair follicles, which contain glands. The glands in the hair follicles produce an oily substance called sebum, which keeps the skin and hair from drying out. Daily washing will keep the skin on the face and other areas of the body clean by removing the dirt, oil, and dead cells before they can accumulate.

3. Form a conclusion: Which properties were most useful for identifying minerals? Why? _________________________________________________________________________ _________________________________________________________________________ Mineral Key Use the following steps to identify a mineral: 1. Decide if the mineral is metallic or non-metallic based on its luster and streak.

The outer most layer of the skin or Epidermis contains stratified squamous, keratinized, epithelial tissue; which lacks blood vessels, and the cells are packed closely together (Sloane, 1994, p.85)

The writing in college composition classes and the workplace both rely upon Selected Answer: Correct a) organization & clear expression. Correct Answer: Correct a) organization & clear expression. Question 2 4 out of 4 points The three basic parts of a document in transactional writing are Selected Answer: Correcta. message-support-closure. Correct Answer: Correcta. message-support-closure. Question 3 0 out of 4 points How many functions of external and internal correspondence does your text identify? Selected Answer: Incorrect a) two Correct Answer: Correct b) three Question 4 4 out of 4 points Another word for template is Selected Answer: Correct c) macro. Correct Answer: Correct c) macro. full block Question 11 0 out of 4 points The business letter form that the text says imparts a feeling of directness without a strong personal touch is the ________________ form.

Part II: For the following questions, provide your response in short-answer format (2–3 detailed sentences each). Use this Phase’s activities and resources to assist you in answering.

B. Ans • The dermis contains elastic and fibrous tissues such as fibrillin, collagen and elastin. These tissues gives

4. The last tapping sound you hear indicates the diastolic pressure. As you have seen, a pulse is measured as the distention of an artery that can be felt each time the heart contracts. Pulse is measured in number of beats per minute. You can measure pulse anywhere an artery passes close to the skin. Clinically, it is most common to measure heart rate in the radial artery on the inside of the wrist. The figure shows you the procedure.

There are three primary layers of the skin: the outer layer, the epidermis and the layer beneath, the dermis and the hypodermis. The epidermis is thin, tough and waterproof while protecting the body from outside bacteria invading the body. It also contains keratinocytes which are from the basal layer which

1.1 Outline the anatomy and physiology of the human body in There are different kinds of joints in the human body (hinge/ball joint and socket and spin for example). They are joined together ball joints and socket joints fit together nicely do you can move your ankles, toes and

Stratum Granulosum is another shallow layer; it is made up 3 to 5 layers of flat packed grainy cells called kertaohylain cells which act similar to a water filter, to absorb any foreign bodies. This eases water loss and keeps up hydration in the skin.