Epidermis
This is the most abundant cell type in the epidermis, accounting for roughly 90% of all epidermal cells.
Keratinocytes
This superficial layer of the dermis consists of areolar connective tissue and contains dermal papillae.
Papillary Layer
This smooth muscle is responsible for pulling hair upright, resulting in "goosebumps."
Arrector Pili Muscle
This secretion is naturally slightly acidic, creating an "acid mantle" on the skin surface to inhibit the growth of bacteria.
Sebum
This is the name of the organelle where melanin is synthesized before being transferred into the "arms" of the melanocyte.
Melanosome
This epithelial layer is only found on the palms of your hands and soles of your feet
Stratum Lucidum
This deeper, thicker layer of the dermis is composed of dense irregular connective tissue.
Reticular Layer
This actively growing part of the hair is located at the very base of the hair bulb.
Hair matrix
These glands are primarily found in the axillary and anogenital regions; they produce a thicker, protein-rich sweat that leads to body odor when broken down by bacteria
Apocrine sweat glands
This pigment is found in certain vegetables and tends to accumulate in the Stratum Corneum and the fatty tissues of the hypodermis.
Carotene
This deepest layer of the epidermis is attached to the basement membrane and is the site of constant cell division.
Stratum Basale
These lines in the reticular dermis are formed by the orientation of collagen bundles and are critical for surgical incisions.
Cleavage lines
This part of the nail is the fold of skin that overlaps the proximal end of the nail body.
Eponychium
This specific method of secretion, used by both Eccrine and Apocrine glands, involves the release of products via exocytosis without damaging the cell.
Merocrine secretion
This term describes a pale or ashen skin tone often caused by low blood pressure, anemia, or emotional shock
Pallor
These immune cells, located primarily in the stratum spinosum, act as macrophages to defend against pathogens.
Dendritic cells
This layer (also known as the subcutaneous layer) is not technically part of the skin but anchors it to underlying bone and muscle.
Hypodermis
This phase of the hair growth cycle is the "resting phase," where the hair follicle is inactive and the hair eventually falls out.
Telogen phase
While they share a name with "Apocrine" glands, these specific glands in the female anatomy are actually highly modified sweat glands specialized for milk production.
Mammary glands
This is the amino acid that melanocytes use as a raw material to synthesize the different forms of melanin
Tyrosine
These specific cells function as light-touch sensory receptors and are found in the stratum basale.
These sensory receptors, found deep in the reticular layer, detect deep pressure and high-frequency vibration.
Lamellated corpuscle
This is the visible portion of the hair that extends beyond the surface of the skin and consists entirely of dead, keratinized cells
Hair shaft
When body temperature rises, the hypothalamus sends signals to these glands to increase output, a process known as "active thermoregulation."
Eccrine sweat glands
These are the finger-like extensions of a melanocyte that allow it to "reach out" and distribute melanosomes to approximately 30 different keratinocytes.
Cytoplasmic extensions