Integumentary Integumentary q Combining forms for skin q

Integumentary

Integumentary q Combining forms for skin § § q cutane dermat derma Functions of the skin § § Protective membrane Glands which produce secretions Nerve fibers for sensation Maintain body temperature

Structure of the skin q § § § § Epidermis Takes 21 days for normal mitosis of an animal’s skin Animals have thinner epidermis layers than humans Made up of squamous epithelium (flat, platelike cells) Avascular Depends on capillaries for nourishment Melanocytes Keratin (Kerat – horny) is a protein that provides skin with its waterproofing properties

Structure of the skin q Dermis § § § § Composed of blood, lymph vessels, nerve Fibroblasts Histocytes (macrophages) Mast cells Arrector pili Sebaceous gland Sweat glands Follicles

Structure of the skin q Subcutaneous Layer Located under the dermis and is composed of connective tissue - fat or lipid or adipose tissue. Fat (adipose) cells

Hair q Types of hair Fur Guard hairs Secondary Hairs Tactile Hair � q Hair development Simple Compound � q Color of hair 3 primary pigments Gray hair White hair Shedding/Molting

Nails, Horns, Hooves q Quick q Coronary band (Coronet) q Chestnuts/Ergots q Horn q Antler

Feathers q Types of feathers § Contour o Remigies o Rectricies § § q Semiplume Down Filoplume Bristles Wing trims § Larger birds - trim the first 4 primary remigies § Smaller birds - trim the first 5 -6 primary remigies