Lecture 1 Flashcards
What are the 9 Mammalian traits?
Vertebrates, warm blooded, hair on bodies, 4 chambered heart, single jaw bone, sweat glands, mammary glands, live young
What is the acronym for skin functions?
PREPS
What does PREPS mean?
Protection, Respiration, Excretion, Perception, Storage
The dermis is connected to epidermis via….
basement membrane
What is the dermis made up of?
1/5th Papillary region, 4/5 Reticular region
The papillary region is made up of….
connective tissue and elastic fibres
The reticular region is made up of….
dense connective tissue, elastin & collagen
What is the hypodermis?
Loose connective tissue
The main components of the hypodermis are….
fibroblasts, adipocytes, macrophages
What does adipose tissue do?
Fat droplets, energy reserve, insulator
The thickness of skin for Reptiles, Birds, Mammals?
Thick dry scaly, Thin lipogenic, Thick waterproof
Characteristics of epidermis Reptiles, Birds, Mammals?
Keratinous, Delicate, 4-5 layers
The shedding of skin is called what in Repitles, Birds and Mammals?
Ecdysis, Moult, Slough
What are the glands called in Reptiles, Birds, Mammals?
Femoral, Uropygial, Sebaceous Sudiferous
What are the main pigment cells in Reptiles, Birds, Mammals?
Chromatophores, Pigments, Melanophores
3 main types of hairs in mammals are…
Guard, Wool, Tactile
Guard hairs - characteristics?
Smooth outer coat
Wool hairs - characteristics?
Fine curly
Tactile hairs - characteristics?
Long and stiff
What oil do the hairs contain?
Lanolin - sebaceous glands
Hoofs, Claws, Nails?
Dense keratin, ungulates (distal phalynx)
Horns belong to which animals?
Bovines, Ovines, Caprines (Cow, sheep, goats)
Characteristics of horns?
Keratinised, nutrition affects
Antlers belong to which animals?
Cervidae (deer)
Characteristics of antlers?
Grow seasonally, velvet over bone, branched
Difference of a Rhino horn?
Center of calcium/melanin, keratin tubes, diet