ANATOMY Unit 1 Notes: Rat Dissections

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Presentation transcript:

ANATOMY Unit 1 Notes: Rat Dissections

(1) Organs To Know Heart Lungs Diaphragm Stomach Liver Small Intestine Large Intestine Kidneys

(2) Initial Incisions Lie rat on its back. Press down on limbs to open up chest + belly. Make 2 horizontal incisions: - (1) Directly below throat - (1) Directly above crotch Make 1 vertical incision: - From throat  crotch - Pull up on skin + muscle to avoid cutting internal organs.

(3) 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.

(4) 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. Small Intestine: Flesh colored, squiggly tube. Small = Thin in diameter. Middle of abdomen, connecting to stomach. Large Intestine: Large = Thick in diameter. Middle of abdomen, connecting to anus.

(5) 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!!

(6) 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.