POST-LAB DISCUSSION AND REVISION

Revise answers to questions.

Revise heart diagram (using checklist).

Complete systems chart.

Heart dissection Lab- Assessment Criteria4-point scale: 4- Exemplary 3- Proficient 2- Developing 1- Emerging

Points Student Evaluation

Teacher’sEvaluation

1. Labeled drawing is an accurate representation of the specimen. Arrows show blood flow within the heart.

4

1. Answers to guide questions complete and accurate. 4

1. Identified the main function/s of the heart and discussed how it acts as a “pump system”.

4

1. Accurately described the different structures of the heart. 4

1. Properly described the behavior of each structure. 4

1. Explained how the different structures work together to perform its function.

4

Total (out of 24) 24

GUIDE QUESTIONS:1. You will also find tiny blood vessels along the surface of the heart. These are

the coronary arteries and veins. Why do you think these blood vessels are very important?

2. The purpose of the valves is to prevent the blood from flowing backward. Using a dissecting needle (or the tip of a forceps), puncture a valve and try to lift the heart. 2- What do you observe? Explain.

3. Notice that the left ventricle is thicker than the right ventricle. Can you give a reason why?

4. Observe carefully and compare the thickness of the ventricle walls to the atria walls. Which are thicker? Explain (relate this to the two structures’ behavior).

5. Why do you think the aorta is designed to be smooth and large?

Criteria YES NOTitle , scale and source of material are listed

Drawing is neat and made with clear pencil lines.Labels are neatly written and arrows parallel right hand side..

Structures are properly labeled. At least 4 from the following; right and left atrium, aorta, right and left ventricles, valves between atrium and ventricle, septum: Extra: vena cava, pulmonary artery, pulmonary vein

Accurate representation (not an “idealized” drawing)

Self Rating (out of 4)4- Exemplary 3-Proficient 2- Developing 1- Emerging

/4

CHECKLIST: MAKING BIOLOGICAL DRAWINGS