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Animal Lab Exam
Lab 9
26
Biology
Undergraduate 2
04/03/2012

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Term
Dominance of mammals in comparison to other chordates is considered the result of
Definition
more highly developed nervous system
Term
Pig Classification
Definition
Phylum Chordata
Class Mammalia
Order Artiodactyla
Genus Sus (italic)
Species domesticus (italic)
Term
Adduction
Definition
describes movement of a body part toward the midline
Term
Abduction
Definition
describes movement of a body part away from the midline
Term
Flexion
Definition
describes movement that decreases the angle between two bones
Term
Extension
Definition
describes a movement that increases the angle between two bones
Term
Proximal
Definition
describes the portion of a structure closer to the body
Term
Distal
Definition
describes the portion of the structure farther away from the body
Term
body of the pig is divided into 4 main regions
Definition
1. head
2. neck
3. trunk - from which appendages attach
4. tail
Term
trunk divided into two sections
Definition
thorax - anterior portion, encased by ribs
abdomen - posterior portion
Term
vibrissae
Definition
stiff sensory hairs on the snout
Term
pinnae
Definition
external ears
Term
nictitating membrane
Definition
third eyelid, covers the medial corner of the eye, moves across eyeball to keep it clean
Term
In pigs which digit has been lost?
Definition
the first digit, corresponding to our thumb or big toe
Term
the posture of a pig is called
Definition
digitigrade, meaning they walk on their toes
Term
the posture of a human is called
Definition
plantigrade, meaning we walk on our foot
Term
humans are bipedal, whereas pigs are
Definition
quadrupedal, because they walk on all four feet
Term
function of the umbilical cord
Definition
supplies food and oxygen for the fetus from the mother and aids in the movement of wastes from the fetus to the placenta
Term
four tubes of umbilical cord
Definition
umbilical vein: carries blood from the placenta to the fetal heart
umbilical arteries: (2) carry blood away from the fetus
allantoic duct: removal of waste products
Term
Male vs. Female
Definition
male - swelling of scrotal sacs ventral to the tail, urogenital opening on mid-ventral surface of abdomen

female - urogenital opening ventral to anus
Term
3 main functions of skeleton
Definition
1. supports the body
2. protects delicate structures
3. provides area for muscle attachment
Term
Skeleton of vertebrates divided into two regions
Definition
1. Axial: form the axis of the body
2. Appendicular: limbs and other supporting girdles
Term
5 sections of the vertebral column
Definition
1. cervical
2. thoracic
3. lumbar
4. sacral
5. caudal
Term
function of thyroid gland
Definition
endocrine gland producing thyroxin used to maintain high level of metabolism and heat production
Term
function of the spleen
Definition
production, storage and elimination of red blood cells
Term
function of pancreas
Definition
secretes enzymes that break down all major categories of food, also contains endocrine patches that produce insulin, a hormone essential for normal carbohydrate metabolism
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