Download PIGEON DISSECTION

RAT
DISSECTION
Image from:
http://www.animationlibrary.com
Mammals lived at same time
as dinosaurs; mammals
spread out when dinosaurs
became extinct
RAT
LATIN meaning
ANIMALIA
KINGDOM _____________
PHYLUM ____________________________
CHORDATA
VERTEBRATA “backbone”
SUBPHYLUM ___________________________
Mammalia
“breast”
CLASS _______________________________
RODENTIA “to gnaw”
ORDER _____________________________
http://hocktamas.fw.hu/apple/apple/Faux%20Fur%20(wide%20screen).jpg
Hair or Fur
http://www.carrythememories.com/images/zebra_fur.jpg
Provides insulation
(hold in body heat)
Identification
Camouflage
http://www.alibaba.com/photo/50033899/Printed_Fur.jpg
Nictitating membrane missing
VIBRISSAE
EXTERNAL NARES
Tympanic membrane (eardrum)
inside ear opening
PINNA
Catches
sound
MAMMARY
GLANDS
Modified sweat glands
Males are non-functional
Have nipples but don’t have
right hormones to make
milk
EXIT OPENINGS
Separate exit for feces = anus
3 openings
2 openings
Image by Riedell/VanderWal©2005
FEMALES
have 3 Exit
openings
MALES
have 2 Exit
openings
Image by Riedell/VanderWal©2005
Image by Riedell/VanderWal©2005
DIAPHRAGM
Image by Riedell/VanderWal©2005
Image by Riedell/VanderWal©2005
DIAPHRAGM
Contracts to pull in
air
Divides coelom into:
THORACIC CAVITY
heart & lungs
ABDOMINAL CAVITY
digestive, excretory,
reproductive organs
SPLEEN
Peeks out from behind
stomach
Makes, stores, and
processes blood cells
PANCREAS
(In mesentery next to duodenum)
Makes TRYPSIN
digest proteins
Makes INSULIN
tells cells to store blood
glucose as glycogen
Makes GLUCAGON
tells cells to release
stored glycogen into
bloodstream as glucose
MESENTERY
Image by Riedell/VanderWal©2005
Image by Riedell/VanderWal©2005
Stomach
STOMACH Add acid/grind & mash food
SMALL INTESTINE:
DUODENUMAdd trypsin (digest proteins) & bile (digest fat)
JEJUNUMFinish digestion/absorb nutrients
ILEUMFinish digestion/absorb nutrients
CECUM“J” Pouch at junction of small and large intestine
Contain bacteria to digest plant material
LARGE INTESTINECollect & Concentrate digestive waste
absorb water back from feces
RECTUMLast part of Large intestine
Stores feces waiting to exit
ANUS
Exit opening for digestive waste only
DID YOU KNOW?
Human small intestine = about 22 feet long
Human large intestine = 5 feet long
Food can spend as long as 4 hours in the
small intestine
http://scavengerhunt.lee.k12.nc.us/digestive/digestive.jpg%20copy
TRACHEA
Cartilage
rings keep
airway open
Lungs
Image by Riedell/VanderWal©2005
Left side of heart
is largerPumps blood to
entire body
So lungs on that side
are smaller
4 chamber heart
Image by Riedell/VanderWal©2005
Body
organs
RIGHT
Atrium

Right
Ventricle



Lungs
LEFT
Atrium

Left
Ventricle
BIRD & MAMMAL CIRCULATION
4 chambers/2 loops
Image by Riedell/VanderWal©2005
SALIVARY GLANDS
Make digestive enzymes
AMYLASE starts
digesting complex
carbohydrates (starch)
in mouth
SEMINAL VESICLESStore sperm
Add fluids
VAS DEFERENSCarry sperm to
seminal vesicles
EPIDIDYMISMature sperm
Add tails
TESTESMake sperm
OVARYMakes eggs
OVIDUCTCarries eggs to uterus
UTERUSplace where
baby grows
VAGINAExit for baby
VIVIPARITYBaby grows inside mom nourished by placenta
KIDNEYS
URINARY BLADDER