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Biology Lab
Fetal Pig Excretory, Reproductive, and Nervous Systems
54
Biology
Undergraduate 1
04/27/2009

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Term
Sensory nerves
Definition
Carry the data to the central nervous system
Term
Sensory component
Definition
Made up of sensory receptors and sensory nerves
Term
Sensory receptors
Definition
Detect stimuli as light, sound, touch, and the concentration of oxygen in the blood
Term
Central nervous system
Definition
Consists of the brain and spinal cord
Integrates information from all stimuli, external and internal
Sends signals to the motor system
Term
Motor system
Definition
Carries impulses along motor nerves to effectors bringing about the appropriate response
Term
Effectors
Definition
Such as glands, muscles, and other organs
Term
Homeostasis
Definition
The steady state condition in the vertebrate body
Term
Osmoregulation
Definition
The control of tissue water balance and the elimination of excess salts and urea
Term
Urea
Definition
A waste product of the metabolism of amino acids
Term
Renal cortex
Definition
Contains the Bowman's capsule, glomerulus, proximal convoluted tubule, distal convoluted tubule
Term
Renal medulla
Definition
Contains the collecting duct and Loop of Henle
Term
Renal pyramids
Definition
The loop of Henle and and collecting ducts extend into renal pyramids
Term
Ureter
Definition
Connects the renal pelvis to the urinary bladders
Term
Renal pelvis
Definition
Expanded portion of the ureter that collects urine from the collecting ducts of the kidney
Term
Urinary bladder
Definition
Term
Urethra
Definition
Carries urine out of the urinary bladder to either the penis or the vagina
Term
Vaginal vestibule
Definition
Where the urethra and the vagina meet in fetal pigs
Term
Preputial orifice
Definition
The urogenital opening
Term
Inguinal canal
Definition
Leads from the ductus deferens to the scrotum
Term
Scrotum
Definition
Sac containing the testes
Term
Testis
Definition
Produce testosterone and semen
Term
Epididymis
Definition
Stores semen until ejaculation
Term
Ductus deferens (Vas deferens)
Definition
Transports semen away from the epididymis back into the abdominal cavity, where it loops over the ureter and enters the urethra
Term
Seminal vesicles
Definition
Term
Prostate gland
Definition
Term
Ovaries
Definition
Produce eggs, estrogen, and progesterone
Term
Uterine tubes
Definition
Connects one ovary with the uterine horns
Term
Uterine horns
Definition
Allows for multiple fetuses to develop
Term
Cervix
Definition
Leads from the uterus to the vagina
Term
Vagina
Definition
Term
Placenta
Definition
Attaches the fetal pig to the mother pig
Consists of tissue from the inner lining of the uterus and the chorionic vesicle
Term
Chorionic vesicle
Definition
A saclike structure surrounding each fetal pig
Made up of the chorion and the allantois
Term
Amnion
Definition
A very thin, fluid-filled sac around the fetus
Term
Umbilical cord
Definition
Attaches the fetus to the fetal membranes
Term
Neuron
Definition
The functional cell of nervous tissue
Three parts: a cell body, dendrites, and axons
Term
Cell body
Definition
Contains cytoplasm and the nucleus
Term
Dendrites
Definition
Extensions from the cell body that transmit nervous impulses towards toward the cell body
Term
Axon
Definition
An extension that transmits nervous impulses away from the cell body to the next neuron or sometimes to a muscle fiber
Term
Glial cells
Definition
Nonconducting cells that support and protect neurons
Term
Cornea
Definition
Allows the light to enter the eye
Term
Optic nerve
Definition
Connects the eye to the brain
Term
Fibrous tunic
Definition
Made up of the cornea and sclera
Term
Sclera
Definition
Outer layer of the posterior end of the eye
Term
Lens
Definition
Focuses the light on the retina
Term
Vitreous humor
Definition
Holds the retina in place and is the major internal support of the eye
Term
Ciliary body
Definition
A dark, ridged, muscular structure surrounding and attached to the lens by thin ligaments
A component of the second tunic of the eye
Term
Vascular tunic
Definition
A second tunic layer of the eye
Term
Iris
Definition
A component of the vascular tunic
Surrounds the opening of the pupil
Term
Pupil
Definition
Allows light to pass through the vascular tunic to the lens
Term
Retina
Definition
The third tunic of the eye
Contains microscopic rods and cones
Term
Rods
Definition
Ability to see shapes
Term
Cones
Definition
Ability to see colors
Term
Choroid layer
Definition
Another component of the vascular tunic
Absorbs extraneous light rays passing through the retina
Term
Tapetum lucidum
Definition
A tissue found in the choroid of some animals that enhances vision in limited light
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