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SS2, WEEK 8 SECOND TERM.. PRATICALS

 

Practical on Skeletal System

  • Observation of Bones: Study different bones using real specimens or models.
  • Joint Movement Demonstration: Examine ball-and-socket, hinge, and pivot joints.
  • Bone Strength Test: Compare the strength of dried and fresh bones by applying pressure.
  • X-ray Analysis: Observe X-ray images to identify fractures and bone structures.

Practical on Digestion

  • Starch Test (Iodine Test): Add iodine to food samples to detect starch (blue-black color).
  • Protein Test (Biuret Test): Mix food with Biuret solution; purple color indicates protein.
  • Fat Test (Grease Spot Test): Rub food on paper; a translucent spot confirms fat.
  • Enzyme Activity: Observe how amylase breaks down starch into maltose using iodine test.

Practical on Circulatory System

  • Heart Dissection: Study chambers, valves, and major blood vessels of a mammalian heart.
  • Pulse Rate Measurement: Measure pulse rate before and after exercise to observe changes.
  • Blood Smear Examination: View blood cells under a microscope.
  • Capillary Action Demonstration: Use celery stalks in colored water to observe fluid transport.

Practical on a Bird

  • Feather Structure Examination: Observe different types of feathers (contour, flight, down).
  • Bird Bone Study: Examine hollow (pneumatic) bones that aid in flight.
  • Beak and Claw Adaptations: Compare different beak and claw shapes for feeding and habitat adaptation.
  • Dissection (Optional): Study the digestive and respiratory systems of a bird.


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