Blood interactive worksheet - Free Printable

Here is the completed worksheet with explanations for each answer.

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1. The liquid part of blood is called _plasma_.

✔ Explanation: Plasma is the yellowish liquid component of blood that makes up about 55% of total blood volume. It carries blood cells, proteins, hormones, and nutrients throughout the body.

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2. The solid parts of blood are: _red blood cells_, _white blood cells_, and _platelets_.

✔ Explanation: These are the three main cellular components suspended in plasma:
- Red blood cells (RBCs) – carry oxygen.
- White blood cells (WBCs) – fight infection.
- Platelets – help with clotting to stop bleeding.

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3. Write RED BLOOD CELL or WHITE BLOOD CELL in response to each statement below.

a. WHITE BLOOD CELL fight any infection that might enter the body.
→ WBCs are the immune system’s soldiers — they identify and destroy pathogens.

b. RED BLOOD CELL contain a pigment called hemoglobin.
→ Hemoglobin binds oxygen and gives RBCs their red color.

c. RED BLOOD CELL transport oxygen around the body.
→ Their main job is to carry O₂ from lungs to tissues.

d. WHITE BLOOD CELL may be phagocytes or lymphocytes.
→ Phagocytes (like neutrophils) eat germs; lymphocytes (B and T cells) make antibodies or coordinate immune responses.

e. WHITE BLOOD CELL some engulf germs and destroys them.
→ This describes phagocytosis — a key function of certain WBCs like macrophages and neutrophils.

f. RED BLOOD CELL looks like a donut from above and the number 8 from the side.
→ RBCs are biconcave discs — flat in the center, giving them a donut-like appearance when viewed from above.

g. WHITE BLOOD CELL some release antibodies to fight germs.
→ Specifically, B lymphocytes (a type of WBC) produce and release antibodies.

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Part 2: Match the images to the correct name and function

You are given 4 images and need to match each to its name and function using the word bank:

> WORD BANK:
> RED BLOOD CELL | ENGULF AND KILL GERMS | PLATELETS | MAKE AND SEND ANTIBODIES
> HELP BLOOD CLOT | LYMPHOCYTES | PHAGOCYTE | TRANSPORT OXYGEN

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IMAGE 1: Small, irregularly shaped fragments (looks like tiny platelets)

✔ NAME OF COMPONENT: PLATELETS
✔ FUNCTION OF COMPONENT: HELP BLOOD CLOT

→ Platelets are cell fragments that clump together at injury sites to form clots and stop bleeding.

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IMAGE 2: Red, biconcave disc (with “side view” arrow showing it’s concave)

✔ NAME OF COMPONENT: RED BLOOD CELL
✔ FUNCTION OF COMPONENT: TRANSPORT OXYGEN

→ Classic shape of RBCs — designed for maximum surface area to carry oxygen via hemoglobin.

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IMAGE 3: Irregular white cell with pseudopods (looks like it’s “eating” something)

✔ NAME OF COMPONENT: PHAGOCYTE *(or you can say WHITE BLOOD CELL — but “phagocyte” is more specific)*
✔ FUNCTION OF COMPONENT: ENGULF AND KILL GERMS

→ Phagocytes (like macrophages or neutrophils) surround and digest pathogens — this image likely shows one in action.

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IMAGE 4: Round cell with large nucleus (typical lymphocyte shape)

✔ NAME OF COMPONENT: LYMPHOCYTES *(a type of WHITE BLOOD CELL)*
✔ FUNCTION OF COMPONENT: MAKE AND SEND ANTIBODIES

→ B lymphocytes produce antibodies that target specific pathogens. (T lymphocytes help coordinate immune response.)

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## ✔ FINAL ANSWER SUMMARY:

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Section 1:

1. plasma
2. red blood cells, white blood cells, platelets
3.
a. WHITE BLOOD CELL
b. RED BLOOD CELL
c. RED BLOOD CELL
d. WHITE BLOOD CELL
e. WHITE BLOOD CELL
f. RED BLOOD CELL
g. WHITE BLOOD CELL

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Section 2: Matching Table

| Image # | Name of Component | Function of Component |
|---------|-------------------|------------------------------|
| 1 | PLATELETS | HELP BLOOD CLOT |
| 2 | RED BLOOD CELL | TRANSPORT OXYGEN |
| 3 | PHAGOCYTE | ENGULF AND KILL GERMS |
| 4 | LYMPHOCYTES | MAKE AND SEND ANTIBODIES |

*(Note: If your teacher expects "WHITE BLOOD CELL" instead of "PHAGOCYTE" or "LYMPHOCYTES", those are also acceptable since both are types of WBCs. But the more specific terms are better if available.)*

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Let me know if you’d like this turned into a printable version or need diagrams explained further! 🩸📚