integumentary system

Epithelial tissue

Primary tissues serves as barrier cilitated columnar squamous cuboidal simple smooth

Connective tissue

Diverse group of tissue support and structure to body blood adipose cartilage loose connective tissue bone dense

Muscle tissue

Major tissue in body provides movement and force generation for either moving body or moving substances through internal organ

Endocrine

Definition: Ductless glands that release hormones

directly into the bloodstream.

Examples: Pituitary, thyroid, parathyroid, adrenal

glands, pancreas (endocrine portion), gonads.

Function: Long-term regulation of growth,

metabolism, reproduction, and homeostasis.

TEAS Focus: Endocrine = hormones → blood → target organs

Exocrine

Definition: Glands that secrete substances

through ducts to an epithelial surface.

Examples: Sweat glands, sebaceous (oil) glands,

salivary glands, pancreas (exocrine portion →

digestive enzymes); Parotid Gland

Function: Localized effects like lubrication,

digestion, and temperature regulation.

TEAS Focus: Exocrine = ducts → surface (skin or

lumen).

Negative feedback

Response reduces or stops the original stimulus to maintain balance homeostasis high blood sugar = insulin to bring back down

Positive feedback

Response enhances or increases

the original stimulus, driving a process to

completion.

Pituitary

Growth hormone

TSH , ACTH