Reproductive System11. On this worksheet, they will try to draw the listed body parts onto the outline of the human Shirley's Anatomy and Physiology Curriculum:Anatomy Scope and Sequence FREEBIEUnit 0: First Week/ Class ProceduresIntroduction to Anatomy First Day Assignment (Need to Update)Student QuestionnaireSyllabus Template and Example (Need to Update)Unit 1: Introduction to Anatomy & Physiolo. As the stratum basale continues to produce new cells, the keratinocytes of the stratum spinosum are pushed into the stratum granulosum. This product includes 10 different crossword puzzles and their answer keys. Integumentary system worksheet grade 6. The hypodermis consists of well-vascularized, loose, areolar connective tissue and abundant adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for the integument. This worksheet includes 10 questions for students to follow along with the Operation Ouch Video on the integumentary system found on Youtube.
The dermis is made of two layers of connective tissue that compose an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts (Figure 5. This layer makes up around 80% of the dermis and is well vascularized and has a rich sensory and sympathetic nerve supply. The skin and its accessory structures make up the integumentary system, which provides the body with overall protection. This ABC video follows the story of a pair of fraternal African-American twins, one of whom is albino. Cells in the stratum corneum are periodically shed. The epidermis is avascular and cells of this layer must get their oxygen and nutrients from capillaries in the dermis. Integumentary system questions and answers. Granulated protein found in the stratum granulosum. Specialized dendritic cell found in the stratum spinosum that functions as a macrophage. This FREE science text will teach students about the hair, nails, skin, and oil and sweat glands. Melanosomes are temporary structures that are eventually destroyed by fusion with lysosomes; this fact, along with melanin-filled keratinocytes in the stratum corneum sloughing off, makes tanning impermanent. The dermis might be considered the "core" of the integumentary system (derma- = "skin"), as distinct from the epidermis (epi- = "upon" or "over") and hypodermis (hypo- = "below"). Schaum's is the key to faster learning and higher grades in every subject. Two other cell types are found dispersed among the basal cells in the stratum basale.
A finger-like projection, or fold, known as the dermal papilla (plural = dermal papillae) is found in the superficial portion of the dermis. A sudden drop in oxygenation can affect skin color, causing the skin to initially turn ashen (white). Similarly, Addison's disease can stimulate the release of excess amounts of adrenocorticotropic hormone (ACTH), which can give the skin a deep bronze color. Teach students about the human body integumentary system using this free print and digital lesson. Deeper layer of the dermis; it has a reticulated appearance due to the presence of abundant collagen and elastin fibers. The melanin is transferred into the keratinocytes via a cellular vesicle called a melanosome (Figure 5. The body mass index (BMI) is often used as a measure of fat, although this measure is, in fact, derived from a mathematical formula that compares body weight (mass) to height. The skin consists of two layers and a closely associated layer.
The papillary layer is made of loose, areolar connective tissue, which means the collagen and elastin fibers of this layer form a loose mesh with abundant ground substance supporting the hydration of the skin. Schaum's Outline of Human Anatomy and Physiology, 4th Edition. You may use both your notes and textbook to answer questions. This thin layer of cells is found only in the thick skin of the palms, soles, and digits. Other changes in the appearance of skin coloration can be indicative of diseases associated with other body systems.
Connective tissue connecting the integument to the underlying bone and muscle. Collagen injections and Retin-A creams help restore skin turgor by either introducing collagen externally or stimulating blood flow and repair of the dermis, respectively. Layer of the epidermis superficial to the stratum basale, characterized by the presence of desmosomes. This stored fat can serve as an energy reserve, insulate the body to prevent heat loss, and act as a cushion to protect underlying structures from trauma. I made several copies of the descriptions and images o. The accumulation of melanin in keratinocytes results in the darkening of the skin, or a tan. Within the papillary layer are fibroblasts, a small number of fat cells (adipocytes), and an abundance of small blood vessels. The skin is composed of two major layers: a superficial epidermis and a deeper dermis. The hypodermis (also called the subcutaneous layer or superficial fascia) is a layer directly below the dermis and serves to connect the skin to the underlying fascia (fibrous tissue) surrounding the muscles. In much of the developed world, insufficient exercise coupled with the ready availability and consumption of high-calorie foods have resulted in unwanted accumulations of adipose tissue in many people. As new keratinocytes are produced atop the stratum basale, the keratinocytes of the stratum spinosum are pushed into the stratum granulosum. This happens when the oxygen supply is restricted, as when someone is experiencing difficulty in breathing because of asthma or a heart attack.
Fascia is a thick connective tissue wrapping that surrounds skeletal muscles anchoring them to surrounding tissues and investing groups of muscles. The desmosomes interlock with each other and strengthen the bond between the cells. It requires about 10 days after initial sun exposure for melanin synthesis to peak, which is why pale-skinned individuals tend to suffer sunburns of the epidermis initially. The pigment melanin, produced by melanocytes, is primarily responsible for skin color. This Crossword Puzzle Set of 10 package is great for vocabulary building and is used at the end of each one of my units as a post test activity. What determines the color of skin, and what is the process that darkens skin when it is exposed to UV light? Liver disease or liver cancer can cause the accumulation of bile and the yellow pigment bilirubin, leading to the skin appearing yellow or jaundiced (jaune is the French word for "yellow"). It is interesting to note that the "spiny" nature of this layer is an artifact of the staining process. This superficial layer of the dermis projects into the stratum basale of the epidermis to form finger-like dermal papillae (see Figure 5. This leads to a loss of color in patches (Figure 5. The topmost layer, the stratum corneum, consists of dead cells that shed periodically and is progressively replaced by cells formed from the basal layer. It is made of four or five layers of epithelial cells, depending on its location in the body.
Most superficial layer of the epidermis. The more superficial papillary layer serves as an anchor point for the epidermis above and is intimately connected to the deeper reticular layer. Structure that forms an impermeable junction between cells. The increased keratinization (also called cornification) of the cells in this layer gives it its name. Identify and describe the hypodermis and fascia. Cell that produces keratin and is the most predominant type of cell found in the epidermis. Each Outline presents all the essential course information in an easy-to-follow, topic-by-topic format. These two proteins make up the bulk of the keratinocyte mass in the stratum granulosum and give the layer its grainy appearance. Circulatory System7. The cells in all of the layers except the stratum basale are called keratinocytes, which make up about 95% of all epidermal cells. Receptor cell in the stratum basale of the epidermis that responds to the sense of touch. By the end of this section, you will be able to: Describe the layers of the skin and the functions of each layer. The defect is primarily due to the inability of melanocytes to produce melanin.
The hypodermis, deep to the dermis of skin, is the connective tissue that connects the dermis to underlying structures; it also harbors adipose tissue for fat storage and protection. Describe the role of melanocytes in skin pigmentation.
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