Nutrition, Tissue and skin lab Biological & Biomedical Lab Report

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Pre-Lab Questions
What is tissue?
A tissue refers to a group of cells that are in close proximity and organized perform one or more specific functions.
What is the function of epithelial tissue?
They cover all body surfaces, line body cavities, and constitute significant tissue in glands. They perform various functions that include protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception. These functions are achieved by creating protective boundaries, which allows the movement of ions and molecules.
What is the function of connective tissue?
The core functions of connective tissue include binding and supporting, protecting, insulating, storing reserve fuel, and transporting substances within the body.

What is the function of muscular tissue?
The muscle tissues have many functions, including movement, maintenance of posture, pumping blood, communication, constriction organs and blood vessels, respiration and heat generation.

What is the function of nervous tissue?
Nervous tissue is responsible for coordinating and controlling various body activities and processes. It stimulates muscle contraction, nurtures awareness of the environment, and plays a role in emotions, memory, and reasoning.

Describe sebaceous glands, sudoriferous glands, and hairs with regard to skin function.
Sebaceous glands are holocrine glands found in the skin except in the palms of the hands and soles of the feet. They produce sebum, which is an oily substance composed of fat and the debris of dead fat-producing cells. Sebum is a lubricant that helps to moisturize the skin by preventing the excessive evaporation of water from the skin. It also keeps the skin healthy by controlling the growth of bacteria on the skin. It does this by producing chemicals that are bactericidal. Finally, it conditions the hair to avoid being too try or brittle.
Sudoriferous glands, also called sweat glands, are either of two types of secretory skin glands, eccrine or apocrine. Eccrine and apocrine glands are confined within the dermis and consist of secretory cells and a central lumen into which material is secreted. The eccrine and apocrine glands release in a merocrine way such that substances are released by exocytosis without damage or loss of the secreting cell. Eccrine sweat glands permit temperature control. When body temperature rises during physical activity, or due to increased temperature or fever, these glands respond by secreting sweat. This sweat will evaporate from the surface of the skin, leading to cooling down body temperature.
What is the function of melanin?
Melanin is a natural skin pigment that determines hair, skin, and eye color in people and animals. Melanocytes produce such color pigments. The intensity of such color depends on the type and amount of melanin they have. The various forms of melanin fulfill biological functions, including skin and hair pigmentation and photoprotection of the skin and eye. The skin pigmentation is due to the accumulation of melanin-containing melanosomes in the basal layer of the epidermis.

List the similarities and differences amo...