Tissue organisation, topographical basis Flashcards
Definition of somatic
Whole body, describe elements that make up walls of trunk and limbs, bone, cartilage, skeletal muscle which are supplied by somatic nervous system
Definition od visceral
All organs in trunk, head, neck. Supplied by visceral nervous system (ANS)
Definition of skin
Covers outer body surface, internal structures separated by connective tissue into compartments
Properties of skin
Covers outer body surface of body
Internal structures are separated by connective tissue into compartments
Function of skin
Protection
Thermoregulation
Provides sensory information about surrounding environment
Vitamin D synthesis
Layers of skin
Epidermis
Dermis
Superficial fascia
Structure of epidermis
90% keratinocytes
Melanocytes
Langherhans cells
Merkel cells
Structure of dermis
Connective tissue Macrophages Adipocytes Fibroblasts Collagen Elastic fibres Blood vessels Nerves Glands Hair follicles
Structure of superficial fascia
Collagen
Fat cells
Elastic fibres
Function of superficial fascia
Storage of water and fat
Protection against mechanical shock as fat and water acts as a cushion
Thermal insulation, fat and water acts as heat barrier
Conduction to transport nerves and blood vessels to skin
Structure of deep fascia
Highly organized connective tissue layer
Very little fat, organized collagen fibers in parallel
Function of deep fascia
Conduction
Movement of muscle
Attachment for some muscles
Capsules around organs and glands
Conduction in deep fascia
Vessels, nerves transported via fascia in neuromuscular bundles
Movement of muscles in deep fascia
Wrapped here, can slide over each other
Attachment for some muscles in deep fascia
Temporalis, some limb muscles gain partial attachment here