This document outlines a series of activities and questions for a senior biology class. It includes labeling diagrams of the heart and circulatory system, completing a table, identifying blood cell types under a microscope, and listing components found in blood and urine. Students are asked to label structures, trace pathways, state differences, and explain various circulatory and renal functions. Responses require labeling parts of diagrams, tracing pathways with arrows, completing a table, identifying cell types, and explaining concepts in multiple sentences.

1. FEBRUARY ACTIVITIES - 2019 Senior 3
2nd
term
1) The diagrma shows a section through the heart.
a- Label the superior vena cava,the aorta, the biscuspid valve and the left atrium.[4]
b- Give the letters from the diagram that indicate the blood vessels that contain oxygenated blood. [2]
c- Explain why the wall of the left ventricle is much thicker than the wall of the right ventricle.
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2) The diagram shows the human cisrculatory system.
a- Label structures A and B. [4]
b- By means of arrows show the pathway of a molecule of carbon dioxide from the lower body and hind limbs to the
left atrium. [2]

2. 3) a- Complete the table below:
b- Explain how two structures present in arteries are adapted to their function. [2]
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4) The drawing shows blood as seen under a light microscope.
a- label a phagocyte and a lymphocyte. [2]
b- State two differences between cells F and H.
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c- Explain the function of cell H and describe two adaptations that make the function more efficient.
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3. 5) The following is a list of components of the blood.
a- Identify those that are NOT found in the urine of a healthy person.
BLOOD PROTEINS UREA GLUCOSE RED BLOOD CELLS SALTS WATER
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b- Explain with details your choices.
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c- Explain why UREA is always found in urine of a healthy person.
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