Glands of Skin¶

graph TD
    X[Exocrine] 
    Y[Endocrine]
    X ==> X1[SIngle celled];
    X ==> X2[Multi-cellular];

Multicellular Gland Classification¶

graph TD
    X[Multicellular gland] ==> X1[Shape of Ducts];
    X ====> X2[Shape of secretory epithelium];
    X1 ==>|one tube| X1a[Simple/unbranched];
    X1 ==>|Ducts with branches| X1b[Compund/branched];
    X2 ==>|like Tube Shaped| X2a[Tubular];
    X2 ==>|like sacs of alveoli| X2b[Alveolar/acinar];

Types of Secretion¶

graph TD
    Y[Exocrine gland];
    Z[Endocrine glands];

    Y ==>|By exocytosis| X1[Merocrine];
    X1 ==>|example| X1a[Pancreas…];
    X ==>|lipid content relaesed| X2[Apocrine];
    X2 ==>|examples| X2a[Breast milk …];
    X ==>|bursting| X3[Holocrine];
    X3 ==>|examples| X3a[Subaceous gland];
    X ==>|into blood vessels| X4[Endocrine];
    Z1[intersitioal and endodrine] ==>|them and neighbours | X5[Paracine];

Skin Appendages¶

Origin of Appendages¶

Hair follicular > epidermis invaginate into dermis like gland formation then the stems cells form hair bulb and produces keratin and bundles them hair.

Types of glands in Skin¶

Sebaceous gland => Secbum ==> Moisturising
~~Apocrine~~ sweat gland =>Nervousness ==> protein rich fluid => bacteria eats => Bad smell
Eccrine sweat gland ==>via a duct => sweat during summer (cooling function)

Acne

Secbum Triglycerides produced by Sebaceous gland is breakdown by bacteria to free Fatty acid which irritates the skin form acne lesion ==> blockage of sebum inside hair follicles with lymphocyte infiltration.

graph TD
    X1[Sebaceous  gland] ==> y[secreate via Hair shaft];
    X2[Apocrine Sweat gland] ==> y;
    X3[Eccrine sweat gland] ==>|via| X3a[seperate Duct ];

Eccrine Sweat gland¶

``` mermaid graph TD X[Secretory coil] ==>X1[secreate Water and Nacl rich fluid]; Y[Duct] ==>Y1[reabeorb Nacl => Hypotonic fluid to be secreted];