Mammals Flashcards
- Critical sign of being a mammal
Hair
- Give 8 functions of hair
Protection
Concealment
Waterproofing
Bouyancy
Signaling
Sensitive Vibrissae
Thermal Insulation
- Found in the nasal cavity which provide a high surface area warming and moistening
- Animal that can generate heat inside their body
- Mammals derive from the _______ that have a pair of openings in the skull roof
Turbinate bone
Endothermic
Synapsids
- Thy are the earliest synapsids and only group to survive beyond the Paleozoic
- What are the earliest mammals of the late Triassic were small and mouse shrew-sized
- This group evolved a high metabolic rate that supported a more active life
Therapsids
Diphyodont
Cynodonts
- This allow the cynodonts to breathe while holding a prey
- What are the 3 smallest bone found in mammals
- Give the 3 layers of hairs
Secondary bony plate
Malleus, Incus, Stapes
Cortex, Medulla-pith, Outer cuticle
- Are sensory hairs that provide a tactile sense to nocturnal mammals
- Are tubular, highly coiled glands found in mammals but never in other vertebrates
- Hairless area
- Hair region
Vibrissae
Sweat Glands
Eccrine Sweat Gland
Apocrine Swear Gland
- Gland that protect skin; traps pathogen and most are associated with hair follicles although some
open directly onto the surface - Modified apocrine glands and are rudimentary in male mammals
Sebaceous Gland
Mammary Gland
- Main organ for mastication
- Teeth of reptiles
- Have larger bodies and variable cusp arrangements for (_______) crushing and grinding are specialized (_______) for
piercing
Teeth
Homodont Dentition
Molar, Canine
- Have compressed crowns with one or two cusps for shearing (_______) and slicing
- Have sharp edges for snipping and biting
- Have reduced or absent canines, but molars are broad and high-crowned
Premolar
Incisors
Leukism Hervibore (Ewan ko kay adrian)
- Sebaceous gland in avian
- Where does the fermentation occurs in rabbit and horse
- Where the fermentation occurs in in Ruminants
Preen Gland
Cecum
Rumen
- Is a chain of glucose molecules, but the chemical bonds are difficult to break
- They have a huge four-chambered stomach
- True stomach
Cellulose
Ruminants
Rumen, Reticulum, Omasum, Abomasum
- In herbivores food is regurgitated, re-chewed. And passed to the ______, _______, _______, and
_______
Rumen
Reticulum
Omasum
Abomasum
.
43. Time of the receptivity is known as
44. Animals with only one breeding season a year
45. Animals with more than one breeding season a year
Heat or Estrous
Monoestrous
Polyestrous (duck-billed)
- They are the only egg-laying mammals.
- Are pouched, viviparous mammals
- They are the only placental mammals
Platypus
Marsupials
Eutherians
- Period of arrest
- In eutherians the embryo in the uterus is nourished through a ______
Embryonic diapause
Chorioallantoic Placenta
