Exercise 19: Dissection of the Sheep Brain

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created 9 years ago by jncanf
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1

IN YOUR OWN WORDS, DESCRIBE THE FIRMNESS AND TEXTURE OF THE SHEEP BRAIN TISSUE AS OBSERVED WHEN CUTTING INTO IT.

FELT TOUGH, AND RUBBERY. WHEN CUTTING INTO, IT GETS ALOT SOFTER AS YOU CUT THROUGH.

2

BECAUSE FORMALIN HARDENS ALL TISSUE, WHAT CONCLUSION MIGHT YOU DRAW ABOUT THE FIRMNESS AND TEXTURE OF LIVING BRAIN TISSUE?

THE LIVE TISSUE OF THE BRAIN MUST BE EXTREMELY SOFT AND CAN EASILY BE TORN/ OR BREAK APART EVEN WHEN GENTLY HANDLED.

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OLFACTORY BULB

HUMAN: SMALLER
SHEEP: LARGER

4

PONS/MEDULLA RELATIONSHIP

HUMAN: MORE INFERIOR; STRIAGHT UP AND DOWN
SHEEP: MORE LONGITUDAL TO THE BACK

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LOCATION OF CRANIAL NERVE III

HUMAN: SAME AREA; THINNER AND LOWER
SHEEP: SAME AREA; THICKER AND A BIT HIGHER

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MAMMILLARY BODY

HUMAN: LARGER
SHEEP: SMALLER

7

Ok, so you’re using my notecards which is great. I am glad I could help you out cause I wish I had someone to help me out when I took this course. I know Anatomy is super hard.

I only ask that if you find these notecards helpful, you join Easy Notecards and create at least one notecard set to help others out. It can be for any subject or class. Thanks and don’t forget to rate my helpfulness!

8

CORPUS CALLOSUM

HUMAN: THICKER; IN A STRIGHTER DIRECTION
SHEEP: THINNER; IN A MORE SLANTED DIRECTION

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INTERMEDIATE MASS OF THALAMUS

HUMAN: LARGER; PRESSED UP ON CORPUS CALLOSUM
SHEEP: SMALLER; SMALL SPACE BETWEEN THALAMUS AND CORPUS CALLOSUM

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RELATIVE SIZE OF SUPERIOR AND INFERIOR COLLICULI

HUMAN: LARGER
SHEEP: SMALLER

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PINEAL GLAND

HUMAN: SMALLER
SHEEP: LARGER