Name ______Hour ______

HW week 1 due January 29th

Transport Unit

Due:______
Blood Lab / Questions / 0 / 1 / 2 / 3 / 4 / 5
Diagrams / 0 / 1 / 2 / 3
(below material not attached)
HW / Due:______
Vessels / Page 5& 6 / 0 / 1 / 2 / 3 / 4 / 5
RBC WS / page / 0 / 1 / 2 / 3
Review / blood / 0 / 1 / 2 / 3 / 4

Your Points

Total Points Possible 20pts

Blood Lab

Introduction:

Blood is a tissue made up of two different components, living cells and nonliving liquid. The cellular part has three different cell types, each having different functions or jobs. These three cell types are called red blood cells (erythrocytes), white blood cells (leukocytes), and platelets. The liquid part is called plasma.

In this lab you will:

  • Examine and diagram the three different blood cell types.
  • Compare the blood cell types by appearance, function and prevalence.
  • Examine whole blood, blood plasma, and buffy coat.
  • Compare plasma to the cell types by appearance, function and prevalence.

Procedure:

Part A: Whole Blood

  1. Examine a tube of uncentrifuged whole blood. Do not touch the tube!
  2. What are the four main components of blood:
  3. Examine a tube of centrifuged whole blood. Do not touch the tube!
  4. Label the visible fractions of the whole centrifuged blood in the figure below.

Plasma = yellow Buffy coat = white or uncolored Cellular portion = red

Next to each fraction describe what the fraction is composed of:

Function (Job) / Composition
(material present)

Part B: Red Blood Cells

  1. Examine a prepared slide of human blood under low power. Locate the red blood cells (RBC’s). These cells are numerous and appear like “cherrios” under low power.
  2. Switch to high power and focus on several RBC’s. They are pink and will be the most common cells in your field of view.
  3. Draw, label and color one or two RBC’s in Table 1. Label and color the cell membrane (dark red) and the cytoplasm (light red).
  4. Count the number of red cells present in your field of view and record in Table 1. (Note: count ¼ of the field and multiply by 4.)
  5. Observe and draw the blood of a person with Sickle cell anemia.

Part C: White Blood Cells

  1. Using high power, locate several cells that have a nucleus. They should appear darker in color than RBC’s. Some may have small dots or granules within them. Theses are white blood cells .
  2. Draw, label and color one or two white blood cells in Table 1. Label the cell membrane (purple), cytoplasm, (yellow), and the nucleus (purple).
  3. Count and record the number of WBC’s in one field of view in Table 1.

Part D. Platelets:

  1. Use high power to locate very small, star-like fragments that appear dark and irregularly shaped. These are platelets.
  2. Draw several platelets in Table 1. Label any parts you can identify.
  3. Count and record the number of platelets in one field in Table 1.

Cell Type

/ Diagram Label and Color / Number of Cells in Field
Red Blood Cells
Sickle Cell RBC
White Blood Cells

Platelet

Questions:

  1. What is the function of red blood cells?
  1. When and why do RBC’s lose their nucleus?
  1. What are the main functions of white blood cells?
  1. Structurally, list any differences between RBC’s and WBC’s.
  1. What is the main function of platelets?
  1. In order from least to most numerous list the three types of cells or cell fragments found in blood.
  1. Where in the body are most blood cells produced (Note: there are different sources for different cell types.)

HW Biology – Blood parts and Vessels

  1. Blood transports many substances. List at least 5 below.
  1. List four aspects of homeostasis regulate by blood.
  1. Blood consists of ______percent plasma and ______formed elements, which include ______and ______.
  1. What are the other three structures found in blood besides plasma?
  1. Where are red blood cells produced?
  1. In the space below draw a red blood cell, a white blood cell and a platelet. Make sure to label each of them.
  1. What is another name for a white blood cell? What is its function?
  1. What is one problem that can occur with your circulatory system learned in class thus far?