SOLUTIONS GRADED A+
✔✔Brain, spinal cord, and nerves - ✔✔Location of neurons.
✔✔Neuroglia - ✔✔Provide support, nourishment, and protection to neurons.
✔✔Surrounding neurons in the brain, spinal cord, and nerves - ✔✔Location of
neuroglia.
✔✔Epidermis - ✔✔Protection from the environment, waterproofing, and UV protection.
✔✔Stratified squamous epithelium - ✔✔Tissue composition of the epidermis.
✔✔Stratum Corneum - ✔✔Protects deeper layers, prevents water loss, acts as a barrier
to pathogens.
✔✔Stratum Lucidum - ✔✔Adds extra protection in areas of high friction.
✔✔Stratum Granulosum - ✔✔Formation of the water barrier and initiation of cell death.
✔✔Stratum Spinosum - ✔✔Provides strength and flexibility to the skin.
✔✔Stratum Basale - ✔✔Deepest layer of the epidermis where new cells are generated.
✔✔Tissue Composition - ✔✔Single layer of cuboidal to columnar cells.
✔✔Keratinocytes - ✔✔Main cells of the epidermis, produce keratin, and are responsible
for the protective functions of the skin.
✔✔Melanocytes - ✔✔Cells that produce melanin, the pigment responsible for skin color
and protection from UV radiation.
✔✔Langerhans Cells - ✔✔Specialized immune cells that detect pathogens and help
initiate immune responses.
✔✔Dermis - ✔✔Deeper layer of skin, made up of connective tissue, containing collagen
and elastin fibers.
✔✔Function of Dermis - ✔✔Provides structural support, houses blood vessels, nerves,
glands, and hair follicles.
✔✔Papillary Layer (Dermal Papilla) - ✔✔Upper layer of the dermis, made of loose
connective tissue with finger-like projections.
, ✔✔Function of Papillary Layer - ✔✔Nourishes the epidermis and forms the fingerprint
patterns.
✔✔Reticular Layer - ✔✔Deeper layer of the dermis, thicker and denser with collagen
and elastin fibers.
✔✔Function of Reticular Layer - ✔✔Provides skin strength and elasticity, houses sweat
glands, hair follicles, and sebaceous glands.
✔✔Hypodermis (Subcutis, Subcutaneous) - ✔✔Deepest layer, made up of loose
connective tissue and adipose (fat) tissue.
✔✔Function of Hypodermis - ✔✔Insulates the body, stores fat, and anchors the skin to
underlying structures (muscles, bones).
✔✔Hair - ✔✔Composed of keratinized cells, arises from hair follicles in the dermis.
✔✔Function of Hair - ✔✔Provides protection, regulates body temperature, and has
sensory functions.
✔✔Shaft - ✔✔Visible part of the hair.
✔✔Follicle - ✔✔The structure within the dermis that houses the hair root.
✔✔Root - ✔✔The part of the hair that is below the surface of the skin, within the follicle.
✔✔Nails - ✔✔Hard, keratinized extensions of the epidermis, protecting the tips of
fingers and toes.
✔✔Function of Nails - ✔✔Protects the distal phalanges, enhances fine motor skills,
provides sensory input.
✔✔Sebaceous Glands - ✔✔Glands that secrete sebum (oil) into hair follicles.
✔✔Function of Sebaceous Glands - ✔✔Lubricates and waterproofs the skin and hair,
has antibacterial properties.
✔✔Location of Sebaceous Glands - ✔✔Associated with hair follicles, found everywhere
except palms and soles.
✔✔Eccrine Sweat Glands - ✔✔Most common type of sweat gland, found all over the
body.