Skin and Its Tissues | Arizona State University - Edubirdie

University:
Arizona State University
Course:
BIO 201 | Human Anatomy & Physiology I
Academic year:

2021
Views:

296

Pages:

4
Author:

do3ran7ut

The Integumentary System 1 Skin and Its Tissues The skin is a large organ responsible for: temperature regulation ■ protection of underlying tissues ■ Slowing the rate of water loss ■ housing sensory receptors ■ synthesizing certain chemicals ■ excreting wastes ■ 2 Integumentary system: Roles ■ Physical protection: ◻ ■ Hydroregulation: ◻ ■ Skin synthesizes melanin (color), keratin (toughness) and Vitamin D (Calcium metabolism) Sensory reception ◻ ■ Only lipid based chemicals penetrate (significantly) the skin Synthesis: ◻ ■ Helps regulate body temperature through radiation, evaporation, skin capillaries dilation/constriction Cutaneous absorption: ◻ ■ Prevents water loss (due to keratin and sebum) Thermoregulation: ◻ ■ Barrier against bacteria, UV, chemicals, friction Senses touch, pressure, heat, cold and tissue damage (pain) Communication: ◻ Reflects emotions through facial expressions, gland secretions The skin consists of an outer epidermis and a, dermis connected to underlying tissue by the subcutaneous layer (hypodermis). 4

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