III. Chapter 19 Flashcards
(18 cards)
Respiratory
Exchange of gasses between the blood and air
Cardiovascular (circulatory)
Transports nutrients, wastes, respiratory gases and other materials.
Digestive
Breaks down and absorbs nutrients; stores and removes useable part of food
Urinary
Concentrates and removes liquid waste from blood
Lymphatic
Transports lymph; helps fight off invading pathogens
Integumentary
Covers and protects body
Skeletal
Supports the body; protects its vital organs; provides attachment for muscles (movement); produces cells and stores other materials for the body.
Muscular
Movement
Nervous
Controls body functions and activities
Endocrine
Controls internal body functions with chemicals called hormones
Integumentary system functions
- Acts as a barrier to protect the body from the outside world—protects against pathogens
- Helps the body retain fluids
- Helps maintain body temperature
- Eliminates waste material
- Senses heat, cold, pressure and pain
Components of the Integumentary System
- Skin
- Nerves
- Hair and hair follicles
- Glands
- Blood vessels2
What are three layers skin is composed of?
- Dermis
- Epidermis
- Hypodermis
Epidermis
The epidermis is the outer layer of the skin. The outermost layer of the epidermis is a dead layer, called the Stratum corneum, and contains no nerves or blood vessels. It protects the body from pathogens and water loss.
What are melanocytes?
They produce melanin or pigment for the skin (protects against UV rays)
Dermis
The dermis is the middle layer, and contains blood vessels to thermoregulate, remove waste, and provide nutrition. It contains connective tissues to help cushion the body and fibroblasts which produce the proteins elastin and collagen.
What does collagen give the skin?
The resistance to strain while elastin makes the skin elastic.
What do dermis contain?
They contain mechanoreceptors, nerve endings to sense pressure and temperature.
