BIOLOGY

Unit 7 Notes:PIG

Dissections

(1) Organs In The Chest Cavity• Ribs:

Bones covering heart and lungs.

• Heart:Looks like red-brown nugget in center of chest.

• Lungs:– Look like brown lobes/flaps.– 1 Lung on either side of heart.

• Diaphragm:– Looks like a thin, smooth piece of muscle.– Directly under ribcage.

(2) Organs In The Abdomen• Liver:

– Largest internal organ.– On rat’s right side / On your left side.– Large, hard, brown, lobed organ.– Directly underneath diaphragm.

• Stomach:– On rat’s left side / On your right side.– J-Shaped, squishy sac.– Directly underneath diaphragm.

• Small Intestine:– Flesh colored, squiggly tube.– Small = Thin in diameter.– Middle of abdomen, connecting to stomach.

• Large Intestine:– Flesh colored, squiggly tube.– Large = Thick in diameter.– Middle of abdomen, connecting to anus.

(3) Organs Along The Back• Kidneys:– Look like kidney beans.– Red-brown color.– Must remove all other digestive organs first.– Lie along lower back, 1 on each side.

Yes you need to draw this!!

(4) Basic Organ Function• Heart: Pump blood + circulate nutrients.

• Lungs: Bring in oxygen + expel carbon dioxide.

• Diaphragm: Help lungs fill with air.

• Stomach: Metabolize food.

• Small Intestines: Absorb nutrients from food.

• Large Intestine: Expel food waste.

• Liver: Break down bad blood cells + toxins.

• Kidneys: Filter blood.